The UEFA Champions League round of 16 will be the stage for a number of reunions – among others, Ángel Di María meets former club Manchester United, Leroy Sané faces Schalke, Klaas-Jan Huntelaar comes up against Real Madrid, while Samuel Umtiti will head back to Lyon.UEFA.com trawls the history books and recalls famous continental meetings between players and their old teams. All headline scores are aggregate. Mohamed Salah, Liverpool 7-6 Roma, 2017/18 semi-finals