Arsene Wenger was left speechless and mystified after watching Arsenal contrive to throw away a 2-0 lead at home to Tottenham which cost them the chance to go top of the Barclays Premier League.
Samir Nasri and Marouane Chamakh had put the Gunners in complete control as they looked set to leapfrog Chelsea.
However, Gareth Bale pulled a goal back on 50 minutes, before an inexplicable handball from captain Cesc Fabregas from a free-kick gave away a penalty, which Rafael van der Vaart converted before Younes Kaboul headed in a dramatic late winner.
"If you look at the stats and the numbers, it is very difficult to understand how we lost this game - a drop in concentration, some basic errors, some back luck as well," lamented Wenger, whose side were also beaten 1-0 at Emirates Stadium by Newcastle a fortnight ago.
"You are a bit speechless to re-analyse the game. It is a mystery how you can lose a game like that. If you look at the clear-cut chances that Tottenham had today, it is difficult to understand how we can concede three goals, but we lost it and we can only look at ourselves.
"We could not maintain the focus nor the urgency for 90 minutes because some players dropped. I believe that overall we delivered a performance expected in a game like that quality-wise. However, it was a mixture of fatigue in the second half, and also a lack of cautiousness."