Guangzhou Evergrande were feeling the effects of too much soccer and Al Ahli suffered from not playing enough, their respective coaches said after their Club World Cup quarter-final on Saturday.
Guangzhou coach Marcello Lippi, whose side won 2-0 to earn a semi-final against Bayern Munich on Tuesday, said his Asian champions were on their last legs after an exhausting season which began in early January.
Opposite number Mohamed Youssef said Al Ahli were rusty after the last two Egyptian championships were cancelled following the Port Said stadium disaster in February 2012 and political instability.
"The players have been working for 12 consecutive months, they haven’t had a holiday in that time, we’ve played more than 60 games so this is a great win, especially against a team which is used to this type of competition," Italian World-Cup winning coach Lippi said.
"We have had a whole year of matches, of travelling, of training and the trips are very long in China, five or six hours each time.
"We won the championship, the Asian Champions League and we got to the Chinese Cup final... it never stops."