Manchester United defender Victor Lindelof is undergoing investigations into the cause of the breathing difficulties he suffered during Saturday’s 1-0 win at Norwich, but it is not believed to be related to the coronavirus outbreak at the club.Lindelof, 27, was substituted in the 74th minute at Carrow Road after struggling to catch his breath.The Romans triumph amid while one of their fans suffers from cardiac arrest in the standsUnited interim manager Ralf Rangnick said after the match the Sweden defender also had a higher heart rate than normal, prompting the decision to replace him.In a statement on Tuesday, United said: “Victor is currently undergoing a series of precautionary investigations. He has recovered well from the episode he experienced in the match against Norwich.”All indications are that this is not linked to any Covid outbreak within the club.”Infections here, infections there, infections everywhereUnited’s Premier League match away to Brentford, scheduled for Tuesday night, was postponed after a number of positive Covid-19 tests among players and staff led to the closure of their Carrington training complex on Monday.United’s fixture in west London was the second Premier League game to fall to the virus in three days, after Tottenham Hotspur’s match at Brighton on Sunday was called off.The Red Devils beat the Cannaries thanks to a Ronaldo penalty and De Gea’s late wonder-saveLindelof’s wife Maja opened up about the ordeal in her blog for Elle, describing the sight of her husband doubled over as ‘incredibly uncomfortable’.’It was a scary match to watch and Victor was very cut up afterwards.’ Maja explained.’Yesterday he did a lot of tests and has a heart monitor on for two days to make sure everything is OK. ‘[It was] Incredibly uncomfortable, especially when I did not get hold of him, which I always manage to. ‘It was a long time before I got hold of someone on the team who updated me. ‘Everything seems to be OK as luck would have it and we are waiting for answers to the last tests that will end tomorrow.’© Agence France-Presse