Arsene Wenger accepts he must find a solution to the "big concern" of his young Arsenal side throwing away another chance to get themselves in the driving seat for the Barclays Premier League title race.
The Gunners missed the opportunity to go top of the table on Saturday lunchtime when they let a 2-0 lead slip at home to arch-rivals Tottenham, who recorded a famous first victory at Emirates Stadium.
"We missed an opportunity to make a difference with the teams behind us. It is a big concern, a main concern," the Arsenal boss reflected.
As it transpired, the defeat, a second in a row in front of Gunners fans, did not prove too costly as Chelsea went down 1-0 at Birmingham.
Arsenal, though, slipped back down to third, two points off Manchester United, now behind Carlo Ancelotti's side only on goal difference.
Wenger, however, fully understands there can be no repeat of his team's capitulation if they are to land a first championship since 2004.
He added: "They have the mentality, they want to win. But we have to analyse everything first before I come out.
"I believe some players could not maintain the pace of the game because they played Sunday, Wednesday, and again Saturday, and it's too much."
Wenger added: "But we were 2-0 up and it was all in our hands.
"It is a strange coincidence of facts that happened which are very difficult to explain, even when you are in the job as long as I am."
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