With both teams locked in very different battles at either end of the table, everyone expected Premier League leaders Chelsea to take all three points at Selhurst Park.
It didn't quite work out that way, though.
John Terry found himself on the scoresheet, but it was at the wrong end of the pitch, as he headed into his own net on 52 minutes to put the home team 1-0 ahead.
And that's how things remained, as the Blues suffered their second straight away defeat to leave them clinging on in the title race.
Manchester City's draw at Arsenal later in the afternoon means they now sit two points behind the Blues but have two games in hand. Meanwhile, Liverpool face Tottenham Hotspur at Anfield on Sunday, knowing victory will put them two points clear at the top.
Here's what we learned from Chelsea's defeat at Selhurst Park.