Hazard's two seasons in Spain have been riddled with injuries that have prevented him from hitting top form.
Former Arsenal star Alexander Hleb says he made a mistake by leaving the Emirates to join Barcelona in 2008, and expressed regret at turning his back on managerial 'great' Arsene Wenger.
Ahead of their high-profile clash on Saturday, check out the five standout clashes between Arsenal and Chelsea.
Real Madrid's Cristiano Ronaldo was the scourge of AS Roma again as he inspired the hosts to a 2-0 win and a place in the Champions League quarter-finals on Tuesday, scoring and setting up a goal Rodriguez to seal a 4-0 aggregate victory.
The 29-year-old, who got married this week, received a warm welcome from an unusually large crowd at the Glenn McGrath Oval and looked his usual twitchy self at the crease as he rattled off a half century in 62 balls.