Petr Cech is arguably the greatest goalkeeper in Chelsea history, winning 13 major honours Chelsea legend Petr Cech announced he will be retiring at the end of the season yesterday, and it has led to a predictably massive wave of love on social media. We’re sure the Arsenal side of things is crammed too, but here’s the love he got from some current and former Blues, who helped Petr win everything in the game at Stamford Bridge. What a…