Erik ten Hag has explained why Manchester United's starting centre-backs against Arsenal - Lisandro Martinez and Victor Lindelof - were substituted during the second half.
Both changes at the Emirates Stadium seemed enforced and neither player was on the field when the Gunners scored two injury-time goals to triumph 3-1 and snatch all three points.
When asked about his defensive duo after the defeat, Ten Hag confirmed in his post-match press conference that Martinez had a foot problem and revealed that Lindelof had played the game with symptoms of an illness.
The Swede's inclusion in the starting XI, as a replacement for the injured Raphael Varane, was the only change from United's previous line-up, against Nottingham Forest eight days beforehand.