Chelsea scouts were left impressed by the performance of Bayer Leverkusen winger Moussa Diaby during the German side's Champions League win over Atletico Madrid in midweek, according to 90min.com.
Lining up on the opposite flank to loanee Callum Hudson-Odoi, it is believed Diaby is on the Blues' radar and club officials were present to check on both players.
Having endured a torrid start to the Bundesliga campaign despite hopes of a potential title challenge, Gerardo Seoane's side surprised many with a complete performance against Atletico, of which Diaby netted the second goal.
