Rennes could be forgiven for thinking they had seen the last of Petr Cech. The legendary goalkeeper's announcement in January 2019 that he would retire at the end of that season turned Arsenal's deep Europa League run into a personal farewell tour that took him back to where it all began for a round-of-16 first-leg tie at Roazhon Park in March.
Cech had impressed in his native Czech Republic with Chmel Blsany and Sparta Prague early in his career, but it was his two years with Rennes between 2002 and 2004 that piqued the interest of Europe's top clubs -- eventually earning him a £7 million move to Chelsea aged just 21.