Bolton Wanderers boss Gary Megson felt that tiredness had begun to show among his players during the goalless draw with Middlesbrough at the Reebok Stadium.
The draw was the fourth in five games since Megson took charge of the Trotters, but he thought that his players had started to show the strain from a packed recent schedule.
He said: "This match was maybe a bridge too far in terms of it being our sixth in 17 days.
"We have travelled a lot. Physically it is hard work, but mentally it is even more so. I thought we looked a tired unit running on empty.
"While Middlesbrough have been team bonding we have been flying over Europe, trying to get a result against one of the best sides around.
"It is hard trying to get yourselves up all the time for games. We did not show enough quality in the last third against a tight defensive unit."