There were a few long faces at the training ground on Monday after the nature of Sunday's 1-1 draw against the Hammers with Anton Ferdinand heading home in the last seconds of added time.
"It was a huge disapppointment," admitted Teemu. "When you get a last minute goal like that it's natural for it to feel like a defeat.
"It was similar to the Arsenal game in many ways in that we couldn't score the second goal but as everyone says, you have to play until the final whistle and we got punished. It's something we have to learn from.
It certainly felt like a defeat afterwards but we have to move on from that now and concentrate on Wigan
Ferdinand's late intervention cancelled out Mido's opener and left us without a win in four Premiership games - however, with only two defeats all season, we remain a healthy sixth in the table.
"If you want to stay at the top of the table you have to keep winning games and gaining points and we've had a little slip right now," added Teemu. "We are playing okay though and moving the ball well but we still have moments in the game that we have to cut out."
Meanwhile, it was pointed out to Teemu that he must be happy on a personal level after starting the last three games.
However, he countered: "I'm never happy if we don't get points - my happiness depends on the team. I'm never happy when we lose and of course, after a game like West Ham."
Teemu Tainio says we have to put any lingering disappointment from the West Ham game behind us now and focus on Wigan.