But he has also instilled some grit into his side: already this season they have bounced back from thumpings at Arsenal and Spurs with wins over Chelsea and Sunderland respectively. Martinez returned in the summer to the club he graced for four seasons as a midfielder in the '90s. The Spaniard began his managerial career with Swansea in 2006/07 and, in his first full season, guided them to the League One title. After the Swans just missed out on a Championship play-off place the following term, Wigan came knocking.
Referee: United's opening-day 1-0 win over Birmingham was the first time Lee Mason has taken charge of a game involving the Reds. The Lancashire official has presided over 10 other Premier League matches this season, including Wigan's 2-1 win at Burnley in October, issuing a total of 29 yellow cards and four reds.
Rivals watch: On Tuesday night, high-flying Aston Villa welcome Liverpool and Bolton travel to Hull. The only other game on Wednesday night is third-placed Arsenal's trip to rock-bottom Portsmouth.