West Ham boss David Moyes was happy with their 1-1 draw against Chelsea.
Joo Flix opened the scoring with 16 minutes played in east London, during a testing beginning to the contest which also saw the visitors have two goals chalked off for tight offsides.
West Ham did not wilt, though, and Emerson's 28th-minute leveller his first career Premier League goal and against his former club to boot ultimately proved enough to secure a share of the spoils.
Moyes said, "I've got to give great credit to the boys for coming from behind.
"We didn't look right [at the start] and I have to say early on that Declan Rice played with a virus today, which you could probably see in his performance, his level was a little below where he'd normally be, but after 20 minutes I'd have shook your hand and taken a draw after the way we started.
"Defensively we weren't good today, but the only thing was we kept ourselves in it. We didn't concede a second goal, which would have made it difficult to get back.
"We worked our way into the game, it took us 20 or 30 minutes to get into the game, but as it went on I thought we got a bit better.
"In the second half especially we gave them more of a game and it was a bit more for sharing after half-time."
He added: "Our pressing today was good [and it led to our opening goal when Vladimr Coufal won the ball back and then crossed for Emerson to score].
"We pressed them well and won a lot back.
"We had some joy with it and that part of our game was good. It was probably the bit when they got nearer our goal I was more worried about."