Tunisian weightlifter Khalil El-Maoui has blamed his coach for costing him the chance of winning his nation's first medal at this summer's Olympic Games in London earlier today.

The 23-year-old was second in the men's 56kg competition after the snatch.

However, he failed to take to the platform for the second lift, believing that he had already made the grade.

"It was a mistake," El-Maoui told reporters. "I should have started lifting at 148kg but my coach entered 158kg by mistake."

El-Maoui had been considered one of the favourites to win the competition.