Andrey Rublev is the fifth player to test positive for Covid-19 after playing at an exhibition event in Abu Dhabi this month.
Premier League players are 'reaching breaking point' with their frustration over the congested fixture list.
Scottish football's Joint Response Group (JRG) will begin consultation with clubs over the potential strengthening of protocols between now and the winter break.
Updates on the latest sporting events, including Premier League and EFL fixtures impacted by Covid-19.
Reading's match at home to Luton and QPR's game against Swansea on Saturday have been called off due to Covid-19 outbreaks.
Man Utd have recorded a "small number" of positive Covid-19 cases among players and staff following Saturday's Premier League match at Norwich.
Tottenham players returned to the club's Hotspur Way training ground on Sunday, giving fresh hope their next fixture against Leicester will go ahead as planned.
Queens Park Rangers' Championship match at Sheffield United on Monday has been postponed following a Covid-19 outbreak at the west London club.
Tottenham's game with Rennes will not be rescheduled and has been referred to a disciplinary panel, UEFA has confirmed.
Tottenham's Premier League match against Brighton on Sunday has been postponed after a widespread coronavirus outbreak at the north London club.