Delph netted the winner as Chelsea saw Willian and Ramires sent off.
"I thought we were the better team from the start and we looked like we wanted it more," man-of-the-match Delph told Sky Sports.
"We were well organised, we attacked when we had the chance and we defended well."
He added: "It was my best goal so far in the Premier League. We've been working hard since the last game. No-one gave us a chance. We needed to get a job done here, and luckily we've done it."
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