Australian Open boss Craig Tiley said most players supported being locked down in hard quarantine.
Aston Villa's Premier League match versus Everton on Sunday has been postponed due to an ongoing coronavirus outbreak at the club.
Celtic first-team coach Gavin Strachan has defended the club's trip to Dubai, insisting Christopher Jullien's positive Covid-19 test "could have happened in Scotland".
The Scottish Football Association has imposed a temporary suspension of all football beneath the Scottish Championship for three weeks.
The Scottish Government will decide if Celtic players must self-isolate from Monday after the club's winter training camp in Dubai.
The Professional Footballers' Association (PFA) has reminded players to embrace a sensible approach to celebrating goals amid the COVID-19 crisis.
Sam Querrey, who was sanctioned by the ATP for breaching COVID-19 protocols at the St Petersburg Open in October, has defended his actions.
The Premier League has confirmed a season-high 40 positive coronavirus cases were recorded in the latest week of testing.
Golf courses in England have been ordered to close as part of new lockdown restrictions, although facilities in Scotland are able to remain open.
Man City will launch an internal investigation after Benjamin Mendy appeared to break coronavirus rules by hosting a New Year's Eve party.
Eric Garcia has become the latest Manchester City player ruled out due to a positive coronavirus test.
The schedule for Australia's Test series with India is under threat, with the tourists reportedly unhappy with Covid rules.
Frank Lampard says there are some players in his Chelsea squad that are struggling with coronavirus for longer than others.
The FA have told clubs taking part in the FA Cup third round that they should field a team if they have at least 14 fit players, as they seek to avoid a fixture pile-up.
New Orleans Saints running back Alvin Kamara has tested positive for coronavirus and has been placed on the reserve/COVID-19 list.
Liverpool manager Jurgen Klopp says Premier League clubs must try to keep playing despite a rise in coronavirus cases.
West Ham manager David Moyes wonders if Premier League rules have changed since he tested positive for coronavirus earlier this season.
The BNP Paribas Open, due to take place at Indian Wells in March 2021, has been postponed due to coronavirus concerns.
Rochdale's club doctor Wes Tensel has called for the EFL to see the "bigger picture" and halt the current campaign due to rising cases of coronavirus.
England are looking to appoint a permanent member of staff to supervise mental health as players spend time in bio-secure bubbles.
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