The 28-year-old Spaniard who links up with former Barcelona teammate, Cesc Fabregas at the Stamford Bridge after a botched deal with English giants, Manchester United, was formally introduced on Thursday.
Fourth in the Premier League last season, United have opened the new campaign with 1-0 wins over Tottenham Hotspur and Aston Villa, and Juan Mata believes Friday’s victory at Villa Park showed the team’s readiness.
Victory was United’s second straight 1-0 win after last week’s win over Tottenham and van Gaal believes they can still improve despite their 100 per cent record. The Red Devils were defensively compact and didn’t allow Villa to create any clear cut chances.
A planned march by the English Defence League on Saturday has seen this match brought forward at the request of West Midlands Police and so the TV cameras will get an early shot at Friday Night Football before it becomes a more frequent part of the fixture list next season.