Central midfield – Marouane Fellaini
The man Guarin could be brought in to replace, Marouane Fellaini is another big-name transfer from last summer that hasn’t worked out at all. The Belgian midfielder looked a superb player at previous club Everton, but has been a big disappointment since his £27.5m move and could now leave for almost half that just a year later. Napoli are said to be interested in Fellaini, but it is thought that they won’t pay more than £15m to rescue him from his Old Trafford nightmare this summer.