Gerard Houllier, a former Liverpool coach, now working on FIFA's technical study group, wants to have a debate on the discussion of allowing a fourth substitute in extra-time. The idea is a product of the observation of the intensity of the games in the last 16 round.

"We are here to entertain people. If only at extra-time you are allowed one more player, I think it is a good idea that we will put to football's rules-making panel," he said on Wednesday.

"It's a good idea. Only in extra- time. Maybe if someone is injured, why not?"

A grand total of 29 goals have been delivered by substitute in thw World Cup so far, out of the total 154. Houllier said that he will surely recommend the idea of allowing fourth substitutes for the upcoming matches.

The "usual 10% we are used to seeing" has been totally surpassed by the performance of the players from the bench. "Probably that's why we are seeing so many goals in the last 15 minutes. The physical demands at top level are such that you now need specialists," he said in discussion with former Nigeria chief, Sunday Oliseh.

Oliseh is also part of the techinacl study group. They will be preparing a report on the the 2014 World Cup. Houiller, moreover, has been part of that team since 1994. He also noted that this has been the best World Cup he has seen.

"Some games have been like basketball, the Germany-Ghana tie for example. Teams have worked well on transitions, the magic moment in football is when one team loses the ball and the other has it and that has led to high-tempo games. Teams going forward have been rewarded," Houiller said.

"I thought teams would be economical in expending energy in the first round because of the conditions. But players seem really prepared; there's barely been an argument about this being the end of a long season. It's been end to end stuff and through combination play. The energy the USA and Belgium showed till the end was beautiful," added Oliseh.

With reports from hindustantimes.com