Newcastle legend Alan Shearer says Manchester United must keep hold of Zlatan Ibrahimovic.
Shearer wrote for BBC Sport: "I played in the Premier League until I was almost 36 and to compete at that age you need to have a hunger in training, not just want to keep playing more games.
"On a day-to-day basis you have to keep pushing yourself. Your body is taking more and more punishment and it becomes harder and harder to get through it.
'You need to have huge willpower, but you also need a manager who understands what you need - when you need a rest, and when you do and don't need to train.
"Ibrahimovic has that in Jose Mourinho, which is great, but he still has to go out and do the business on the pitch.
"Mourinho has helped him there too because he knows he has a player who needs feeding, and their style of play does precisely that."
Source: tribalfootball.com