The 20-time grand-slam champion posted a series of tweets on Wednesday afternoon expressing his belief that the sport would be better off with one stronger governing body.

MIKE DICKSON: Roger Federer has sparked a conversation throughout the world of tennis by tweeting a suggestion about merging the governing bodies of the men's and women's game.

Rafael Nadal has endured a series of injuries during his illustrious career but the latest setback appeared to happen in the comfort of his own home. 

Great rivals Novak Djokovic and Rafael Nadal were united by the same misdemeanour this week - breaking the lockdown rules in Spain in order to practise.

EXCLUSIVE: Dan Evans will team up with Kieron Vorster, a no-nonsense South African whose clients have included ex-top-10 player Wayne Ferreira and ex-Chelsea goalkeeper Petr Cech.

EXCLUSIVE: Monica Seles knew that everything had changed when Johnny Carson turned up at the victory party to celebrate her winning the French Open at just 16-years-old, 30 years ago.

MELISSA KITE reveals how she closed the door on her childhood home near Coventry in March, and how her parents must still work part time because HS2 lawyers nailed them down on property price.

MELISSA KITE: Part of the reason is Carrie Symonds. I fear there is something female voters don't like about seeing a man well into his 50s with a girlfriend almost half his age in Downing Street.

New Year's Eve has been and gone but it seems no one has told Ashton Irwin.

5 Seconds Of Summer rocker Luke Hemmings looked worse-for-wear as he left a Hollywood hot-spot on Sunday night

Missing boy William Tyrrell is the nephew of a 5 Seconds of Summer rock star. 5SOS guitarist Michael Clifford, 21, and the toddler's biological father Brendan, 36, share the same father.

He's the drummer in Australian boy band 5 Seconds of Summer who's spent the last year flying solo. And on Wednesday, Ashton Irwin was spotting with a mysterious female friend in Los Angeles.

He's a member of the acclaimed band 5 Seconds Of Summer, who hails from Sydney.

They're one of the hottest boy bands in the world. And the four Aussie musicians of 5 Seconds Of Summer look VERY different to when they broke onto the scene in 2011.

They're the Australian pop-rock group making waves right around the world.

5 Seconds of Summer tell the Today show's Richard Wilkins that dealing with their level of fame is quite scary.

Orpheus Pledger led the arrivals at the Five Seconds for Summer concert at the Metro in Sydney.

Australian pop rockers 5 Seconds of Summer thrilled fans with an acoustic performance in Sydney, on Friday. 

5 Seconds Of Summer were mercilessly mocked by Twitter users for their unique accents during an appearance on The Project on Tuesday night.

Australian pop rockers 5 Seconds of Summer, perform at National Sawdust festival in New York on Monday.

They're the Sydney rockers who recently took out the number one spot on the American Billboard chart with their album, Youngblood. 

5 Seconds of Summer filmed an interview for the Today show hours before kicking off their Meet You There tour of Australia in Sydney this week.

5 Seconds of Summer's Calum Hood performs bizarre leg kick in VERY tight flares during appearance on The Project

It certainly pays to be in 5 Seconds Of Summer.

He debuted his striking red hair on Christmas Day.

They made a spectacular comeback last year with their Youngblood album and are currently promoting their new single, 'Easier'. 

It's been a busy year for 5 Seconds of Summer, with their single Youngblood spending an impressive 46 weeks on the Billboard Hot 100. 

They excitedly announced their engagement in January this year.

They're one of the biggest bands to ever come out of Australia. 

The Australian musicians of 5 Seconds of Summer have been friends since they went to high school in New South Wales. And on Thursday, Ashton Irwin and Callum Hood got coffee together in LA.

The 23-year-old bassist appeared to have no qualms about playing seventh wheel as he arrived for the group date at Double Bay venue The Golden Sheaf.

Calum Hood is the only member of ARIA award winning Aussie pop group 5 Seconds of Summer who is single. 

He's been hard at work recording 5 Seconds of Summer's fourth studio album.

The members of 5 Seconds of Summer played a risky game of Tattoo Roulette on The Late Late Show with James Corden on Friday.

They're the ARIA Award-winning rockers with millions of fans across the world. 

They made a spectacular comeback last year with their Youngblood album.

Proving just how far they've come, Australian punk-rock band 5 Seconds Of Summer were one of the headline acts at this year's KISS 108's iHeartRadio Jingle Ball in Boston on Sunday.

He has been busy in the recording studio with his band 5SOS in the lead up to their fourth album over the past year. 

5 Seconds of Summer drummer Ashton Irwin kicked off the New Year by working up a sweat.

The 24-year-old guitarist, who is engaged to model Crystal Leigh, told Fitzy & Wippa at the G'Day USA gala in Los Angeles on Saturday that he'd asked the 5SOS boys to be his groomsmen

They're the Sydney born rockers who split their time between living LA and touring the globe.

They performed at the Fire Fight Australia bushfire relief concert on Sunday night. 

He proposed to his model girlfriend Crystal Leigh in July 2019.

5 Seconds of Summer put on an energetic show for the 75,000 attendees at Fire Fight Australia on Sunday.

5 Seconds of Summer fans are eagerly anticipating the band's fourth album, Calm. 

5 Seconds of Summer drummer Ashton Irwin admitted he was feeling unwell earlier this week on Twitter.

5 Seconds of Summer's fourth studio album CALM has climbed to the top of the charts in Australia and the United Kingdom. 

All four members of the Australian band 5 Seconds of Summer (5SOS) grew-up Down Under. 

His official spokesman said today that he was receiving 'updates on the coronavirus response' and spoke to Foreign Secretary Dominic Raab and Matt Hancock, the Health Secretary, yesterday.

The Prime Minister has spent a fortnight at his country retreat, Chequers, after being hospitalised with coronavirus.