Frank Lampard became the first Chelsea manager to lose on his Champions League debut as his side fell 1-0 to Valencia on Tuesday.
The Group H game at Stamford Bridge was scoreless until Valencia forward Rodrigo got on the end of a free-kick in the 74th minute to give the away side a 1-0 lead.
Chelsea would have a golden opportunity to level the match in the 87th minute, but substitute Ross Barkley blazed over from the spot to ensure his side would go down to a home loss.