Arsenal know all about familiar faces standing in the way of their title bids, and the Gunners' struggles this season show that little has changed.
Theo Walcott played a part in Mikel Arteta's side dropping points at home to Southampton, while Arteta's former mentor Pep Guardiola is standing in the way of a first title in 19 years. Back in 2003, though, it was a former international team-mate of the Gunners' stars who helped bring them down to earth.
Youri Djorkaeff was a key member of France's 1998 World Cup winning team, starting the final with Patrick Vieira and Thierry Henry on the bench. Five years later, he was part of a Bolton side whose comeback against Arsenal prompted a feisty response from manager Arsene Wenger and dealt their title dreams a devastating blow.