It's another exciting day of action at Wimbledon - and Sportsmail is once again on hand to guide you through everything. Day four includes the likes of Rafael Nadal, Jo Konta and Andy Murray!

RIATH AL-SAMARRAI AT WIMBLEDON: Konta battled back from a set down to sink Stephens and reach the last 16 at Wimbledon. The British No 1 appeared to be heading to defeat but fought back.

Johanna Konta knows she faces an 'inspired' opponent in Petra Kvitova in the last 16 at Wimbledon on Monday. Czech sixth seed Kvitova has breezed into the fourth round.

MIKE DICKSON ON CENTRE COURT: It started with the Centre Court crowd tittering at the velvety baritone of umpire Nouni, and ended with them roaring Konta into the quarter finals.

MIKE DICKSON AT WIMBLEDON: Konta powered her way towards a showdown with Serena Williams on Monday as the American was hit with an £8,000 fine for damaging a championship court.

British Number One Johanna Konta has beaten Czech player Petra Kvitova to reach the Wimbledon quarter-finals.

MIKE DICKSON ON CENTRE COURT: It was all there again for Jo Konta - another Grand Slam semi-final, this time against a possibly vulnerable Serena Williams.

MATTHEW LAMBERT AT WIMBLEDON: The British No 1 led 4-1 in the first set but her Czech opponent reeled her back in and Konta was left looking one-dimensional by the end.

Most of us appreciate the value of a good night's sleep, but how much would you pay to wake up feeling refreshed and restored each day?

Johanna Konta suffered a first-round defeat at the Rogers Cup in Toronto as the British No 1 was beaten in straight sets by 19-year-old Ukrainian Dayana Yastremska.

MIKE DICKSON IN NEW YORK: Konta is relishing big tournaments like never before this year, and she clocked her twelfth victory in the Grand Slams this season by reaching the US Open third round.

The actor, 38, looked enthralled as he watched Johanna Konta of Great Britain play against Karolina Pliskova of Czech Republic on Sunday.

MIKE DICKSON IN NEW YORK: Words with negative connotations are out when it comes to the work she does with Dimitri Zavialoff. The hairdryer is strictly confined to the hotel room.

SNP leader Nicola Sturgeon delivered a withering assessment of the would-be PM, saying he would 'damage the UK's reputation'.

MPs insisted Boris Johnson and rival Jeremy Hunt must 'prove' their commitment to the union during the campaign.

On his first visit to Scotland, Mr Johnson told the SNP leader the UK would leave the EU on Halloween. He was booed by protesters in Edinburgh.

Nicola Sturgeon said the case for breaking up the UK was 'stronger every day' after the research found 52 per cent would support the move.

Nicola Sturgeon warned that Jeremy Corbyn would have to take a 'very firm anti-Brexit position' in order for the parties to work together.

Sir Malcolm Rifkind delivered the stark message after allies of the PM made clear he will try to cling on if he is defeated on a confidence motion by rebel Tories determined to head off No Deal Brexit.

Labour was last night accused of betraying the Union to get Jeremy Corbyn into No10 after it crawled over to the SNP and offered them a second independence referendum.

The SNP leader vowed to pass the law on the issue by the end of 2019 with a view to holding the vote in the second half of next year.

Labour looked set to stop Boris Johnson's plans for an early election last night following talks with the SNP. The parties are thought to have agreed an election can only come after a Brexit extension.

Jeremy Corbyn met Ian Blackford, the Scottish nationalists' Westminster leader, yesterday to agree an election should only be held after Britain has secured another Brexit delay from the EU.

RICHARD LITTLEJOHN: Just imagine the reaction if a bunch of pro-Brexit English MPs had got onto their hind legs in the Commons and started singing Land Of Hope And Glory.

SNP leader Nicola Sturgeon broke ranks with other Remainers by suggesting that a confidence vote to oust Boris Johnson should be held before an extension is secured.

Dominic Cummings told Downing Street staff that Bill Clinton was more popular as he ignored the Monica Lewinsky scandal and concentrated on his political agenda instead.

Shadow chancellor John McDonnell said today that any vote of no confidence would have to come after a crunch EU summit in three weeks time otherwise ex-Tory Remainer rebels would not back it.

Piers Morgan challenged Nicola  Sturgeon to 'suck it up' comparing her defeat in the 2014 Scottish independence referendum to Scotland's rugby loss to Japan yesterday.

Nicola Sturgeon today issued a fresh rallying cry for Scottish independence as she claimed the SNP is 'winning the case' for a split from the rest of the UK, but Downing Street was quick to rebuff her.

The scale of infighting within Labour was underlined last night when more than 100 of Jeremy Corbyn's own MPs ignored his orders to back holding a snap election.

The first minister of Scotland said that her party's message would be 'clear, simple and unambiguous - vote SNP to demand independence and secure Scotland's right to choose'.

Jeremy Corbyn said he last spoke to Ms Sturgeon around 10 days ago, insisting as leaders they had to speak regularly.

Jeremy Corbyn is ready to 'throw the UK under a bus' by forming a coalition with the SNP that would break up Britain, Michael Gove has warned. He said that Labour and the SNP were now 'in bed together'.

Boris Johnson said the 2014 ballot - when Scots voted to stay in the union - was a 'once in a generation' decision.

Ian Blackford said today the SNP will draw up a 'wish list' of demands ahead of potential post-election cooperation talks with Labour as he hinted scrapping Trident could be one of the party's red lines.

The Labour leader said he wanted to add 'realism' to the nuclear non-proliferation treaty (NNPT), with discussions about 'every country's nuclear weapons'.

Mr Johnson has poured cold water on the idea of sharing a stage with Ms Sturgeon, because he is only prepared 'to contest the debates with whoever theoretically could be Prime Minister.'

Nicola Sturgeon has condemned Jo Swinson after the Liberal Democrat leader said without hesitation that she would authorise the use of nuclear weapons.

Nicola Sturgeon tonight claimed Jeremy Corbyn would be willing to sacrifice the Union of the United Kingdom if that was the price of taking power after the election.

Nicola Sturgeon today confirmed she would demand the UK's Trident nuclear deterrent be scrapped as the price of SNP support for a minority Labour government led by Jeremy Corbyn.

Lord Kerslake said the Labour party would 'need to have conversations' with the Liberal Democrats and SNP if the election produces a hung parliament. Labour played down the comments.

The PM even suggested that his Labour rival may throw his weight behind the separatist campaign, and questioned the left-winger's commitment to keeping the United Kingdom glued together.

John Nicholson, the candidate for the marginal seat of Ochil and South Perthshire, tried to rally supporters with a tub-thumping speech ahead of the tightly-fought ballot on December 12.

In a dramatic intervention, Dominic Cummings said the General Election was 'much tighter' than the polls suggested and warned of a 'very real possibility of a hung parliament'.

Nicola Sturgeon's plans for an independent Scotland suffered a hammer blow today after a leading think tank warned splitting from the UK would mean 'more not less austerity' north of the border.

Teenage psychopath Aaron Campbell, who raped and murdered six-year-old Alesha MacPhail on the Isle of Bute, was subject to the SNP's Named Person scheme, a secret report reveals.

STEPHEN GLOVER: The British are respected for their good sense and moderation, or used to be. But they may be about to choose an extremist government that would crash the economy.

The Liberal Democrats lost the East Dunbartonshire seat to the SNP's Amy Callaghan by just 149 votes. Nicola Sturgeon was filmed shaking her fists with joy at the news of her party's gain.

Ms Sturgeon was filmed reacting to the Dunbartonshire East result while doing interviews at the Glasgow count, but has faced fierce criticism over her behaviour.

EUAN McCOLM: English voters wonder why Boris Johnson is bothering with Scotland as its health service is ailing and school attainment has dropped by more than a third due to changes by the SNP.