Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: Petr Cech has revealed in a heartfelt letter that he never envisaged leaving Chelsea after his £10million move to Arsenal was confirmed on Monday. The goalkeeper has signed a four-year contract, worth £100,000-per-week, in a deal that seriously strengthens Arsenal ahead of next season. Cech won every domestic and European trophy at Stamford Bridge after joining from Rennes in 2004. Chelsea manager Jose Mourinho has wasted no time in replacing the Czech Republic No 1, making a £6m bid for Stoke’s Asmir Begovic. We revealed a week ago that Cech had finalised his deal to join Arsenal. Read the full story here.Petr Cech underwent his medical with Arsenal on Friday morningThe goalkeeper has joined for £10million from London rivals ChelseaFormer Blues keeper has signed four-year deal with the GunnersArsene Wenger has been chasing the Czech Republic star since 2013Cech could make his debut against Chelsea in the Community ShieldRoman Abramovich allowed Cech to end his 11-year career at ChelseaChelsea have made a £6m move for Stoke shot stopper Asmir BegovicCech has received death threats from fans purporting to be Chelsea fansTransfer news: CLICK HERE for all the latest 
 Question:_ boss Arsene Wenger told the club's official website that he was 'very pleased' to have signed 'one of the outstanding keepers in the world.'

Arsenal