I think it was Gilberto Silva who scored for Arsenal against PSV Eindhoven in the Champions League.
As of 6-Jan-2010, Arsenal have scored 51 goals in the 2009/10 English Premier League.
Robin Van Persie has scored 92 goals for Arsenal FC in the Premier League since his move to the club.
Peter Ndlovu scored 3 for Coventry City (1995) - 2-3 -League Julio Baptista scored 4 (and missed a penalty) for Arsenal (2007) - 3-6 - League Cup Andrey Arshavin scored 4 for Arsenal (2009) - 4-4 - League
Robin van Persie scored the greatest number of Premier League goals for Arsenal during the 2010-11 season, a total of 18 league goals.
Once in the league for Arsenal.
Drogba scored twice in both of the Arsenal fixtures in the 2009/10 season, for a season total against Arsenal of 4.
No-one Arsenal won 2-1 at Anfield. Lat year Arshevin scored 4 for Arsenal in a 4-4 draw at Anfield.