Petr Cech has made over 900 appearances in an incredible career which has seen him win four Premier League titles, five FA Cups, the Champions League and UEFA Europa League.
With Thibaut Courtois taking over the number one shirt at Chelsea for the start of the 2015-16 season, Cech opted to move across London to join Arsenal for a reported fee of £10million.
Chelsea - who paid tribute to their former keeper on Tuesday despite the fact he no longer plays for the club - would look to offer Cech an ambassadorial role, or a coaching position, potentially within the club's academy.
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"This is my 20th season as a professional player and it is 20 years since I signed my first professional contract, so it feels like the right time to announce that I will retire at the end of this season", wrote Cech on Twitter.
Cech holds the record for the most clean sheets (24) in a single Premier League season. All about his numbers, his performances, his clean sheets, his titles and his professionalism.
Chelsea also reacted to Cech's announcement with a fitting tribute on their website, writing: "Chelsea great Petr Cech has today announced he will be retiring at the end of the season, bringing the curtain down on an incredible career in which he won every major trophy with the Blues including most famously the Champions League in 2012". Many congratulations on such an awesome career'. We know Petr will continue to make a big contribution in the future, whatever he decides to do.
"Having played in the Premier League and won every single trophy possible, I feel like I have achieved everything I set out to achieve".