Azpilicueta was clearly offside as he netted from close range with six minutes remaining to cancel out Victor Camarasa's strike.
It's the best league in the world and probably the worst officials. Either side you should be able to see he's two yards offside.
"He said to me that it's hard because the physical impact of the defenders here is really very strong", Sarri said.
Chelsea were remarkably lacklustre in attack and Marcos Alonso's tame side-foot effort summed up their drab efforts in the first 45 minutes, highlighting how blunt their attack can appear when Hazard is absent.
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For Tech to advance, it would be necessary for one or more players to perform above their norm at the offensive end. But Texas Tech responded by scoring the final nine points of the half and continued that dominance after the break.
"If I was a Burnley or a Brighton fan [two of Cardiff's relegation rivals], they will be absolutely loving it today. We're trying to get this lad to sign a contract".
"We've worked on things for the last three weeks and one of them is coming out at corner kicks and leaving a man in. The equalising goal is the winning goal really, and if you can't see across the line and see offside I don't know why we are in the game".
Chelsea's win could prove telling in the final reckoning, but in the short term their fightback at least eased the pressure on their Italian coach.Sarri gambled with his team selection, once again leaving out Callum Hudson-Odoi as the England worldwide joined Hazard and N'Golo Kante on the bench, but was spared by the impact of another substitute, Loftus-Cheek, in added time.
Chelsea's unlikely late fightback followed sustained chants against Sarri from large groups of irate travelling Blues supporters that included "F-- Sarriball", "We want Sarri out" and "You don't know what you're doing". "I am getting used to this", Sarri said. 'If my players feel like they look in the dressing room, that's the end of our season. Unfortunately. I have to work just in order to change their opinion. In this season he's still very young, only 18, and at the moment he has played for - I don't remember exactly - but 19 or 20 matches.