Cristiano Ronaldo has reportedly emerged as a doubt for Manchester United's Premier League fixture with Newcastle United on Saturday afternoon.
Upon completing his sensational return to Old Trafford late last month, the date of September 11 was immediately pencilled in for the first outing of his second spell.
However, The Sun claims that the Portuguese superstar may have to wait until next week to represent his new club.
Ronaldo has been forced to quarantine since travelling from his homeland last week, preventing him from spending time at United's training facilities.
The coronavirus measures will restrict Ronaldo to just one day with the rest of the squad before the visit of the Magpies.
The report suggests that Ole Gunnar Solskjaer may keep the veteran on the sidelines until United's Champions League trip to Young Boys three days later.
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