Arsene Wenger has been known to be tight when it comes to spending big in the transfer market in recent years, but last summer's £42.5 million arrival of Mesut Ozil changed his old ways.
The sensational signing of Ozil was a factor in Arsenal's road to FA Cup glory but perhaps even more importantly, it changed Wenger's philosophy with regards to transfers.
Prior to last summer, Arsenal's biggest signing was Andrei Arshavin for a then club-record fee of £19 million but now Arsenal have shown that they can attract the very top players.
Alexis Sanchez lit up the World Cup in Brazil recently, helping Chile to a very successful campaign. His £32 million arrival has got Arsenal fans buzzing and they have good reason to be happy.
Last year Arsenal relied too much on the one recognised striker in Olivier Giroud and even with his impressive 22 goals last season, they lacked pace up front.
The unfortunate injuries to Theo Walcott and Alex Oxlade-Chamberlain left Arsenal bereft of pace when counter attacking, but Sanchez will definitely help in that department.
Sanchez was arguably Barcelona's second best player behind Lionel Messi last season, netting a impressive 22 goals from a wide position.
And while Sanchez will help exclusively in attack, the £12 million signing of French international Mathieu Debuchy will help in defence and in attack, with the former Newcastle full-back regularly bombing up and down the right touchline.
These two signings will ignite Arsenal and transform them from fourth-place regulars into Premier League contenders.
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