Chelsea earned their second consecutive away win in the Champions League as Michy Batshuayi netted a deserved late winner for the Blues, in a game where Frank Lampard's youngsters showed their maturity in the Dutch capital.
An engrossing end-to-end start to the match saw both sides have efforts at goal, with the vast majority of Chelsea's attacks coming down the left-hand side through the combination of Callum Hudson-Odoi and Marcos Alonso.
However, it was Quincy Promes who thought he broke the deadlock for Ajax when he turned home from Hakim Ziyech's deflected strike, only for VAR to rule the goal out for offside by the narrowest of margins.