Carlo Ancelotti admitted there was still room for improvement after his baptism in the Barclays Premier League was made all the more enjoyable by a fluke winner from Didier Drogba against Hull.
Chelsea had trailed to Stephen Hunt's 27th-minute opener before Drogba levelled 10 minutes later with a 25-yard free-kick. But, after the Blues had squandered numerous second-half chances, Drogba's attempted cross in the second minute of added time somehow dropped over the head Boaz Myhill for the winner.
"For sure we have to improve because we didn't always play well in this match," said Ancelotti.
"We made some mistakes. But this is normal after one month. We have to improve our play and continuity in matches. This game was very difficult because we went behind.
"But we didn't lose the idea to play and at the end we deserved to win. It is good for the team to believe all the time that they could score.
"This is football, a nice part of football. It is important for us to believe."
Hull boss Phil Brown admitted he was "bitterly disappointed" at losing the game in injury time but was more than pleased with their overall performance.
"I am bitterly disappointed but pleased that we put a marker down in London yet again," said Brown.
"This is what we asked the players to do. We played better than last season and yet we got a point then.
"We got to 92 minutes and were done by a cross which Didier has admitted. It was a pleasing performance and the game plan was to frustrate Chelsea. We knew they had the quality to beat us and turn the game on its head and that happened in the 92nd minute."
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