Martin Jol expected his side to be better prepared to deal with the threat of Andy Carroll as his side lost 3-0 to West Ham.
The Hammers secured the loan signing of Liverpool striker Carroll earlier in the week after courting the 23-year-old for most of the transfer window and he made an immediate impact.
But Jol said: "If you are 5ft 8ins or 5ft 10ins maybe you have got a problem but we should have coped with it. Every game you see him, in the European Championships, you see he is good in the air, he is probably the best in the Barclays Premier League but I still feel there are a few answers for that but we couldn't cope with that."
Jol introduced new striker Dimitar Berbatov at half-time as he looked to find a way back into the game.
The ex-Manchester United forward had little chance to shine but Jol was pleased with the impact the 31-year-old had on his team-mates.
He said: "The only positive was to see Berbatov again and to see his class and quality, I have missed it. What I did see was that Berbatov brought other players into his play and that is his quality, hopefully with Bryan (Ruiz) available for the next match...we should be a bit more positive."