Arsenal have completed the signing of midfielder Tomas Rosicky from Borussia Dortmund.
The 25-year-old Czech Republic international has joined on a long-term contract for an undisclosed fee.
Rosicky said: "I'm really happy to be here at Arsenal, it is a great day for me."
Rosicky, who will join up with his new team-mates after competing in this summer's World Cup, continued: "The team showed their strength recently in the Champions League and have big potential with a lot of young players - I think we can be even better next season."