File photo dated 02-03-2019 of Manchester United’s Alexis Sanchez reacts to an injury. PRESS ASSOCIATION Photo. Issue date: Tuesday March 5, 2019. Manchester United forward Alexis Sanchez is likely to be out for four to six weeks with a knee injury, manager Ole Gunnar Solskjaer has said. See PA story SOCCER Man Utd. Photo credit should read Martin Rickett/PA Wire