Gilberto departure leaves Wenger short on options
The departure of the long-serving 31-year-old World Cup winner came a day after the sale of unsettled Alexander Hleb to Barcelona.
With the combative Mathieu Flamini having also left on a free transfer to AC Milan at the end of last season, Wenger must now rebuild the heartbeat of a team which set the early pace in the Premier League last season before eventually fading out of the title race.