Manchester United manager Alex Ferguson was pleased to see his side's 1-0 win over West Ham open up a gap above Chelsea at the top of the Premier League table.
The win at Old Trafford keeps United top of the league, one point ahead of local rivals and defending champions Manchester City who won 2-0 at Wigan on Wednesday.
Ferguson, however, knows how vital such narrow victories can be in the final reckoning come the end of the season.