An Irish coach has warned the use of sin bins in football has the potential to cause confusion.
Tom O'Connor was in charge of Ireland's Under-16s who beat Austria at a Uefa tournament trialling sin bins.
When keeper Mario Schragl was sin-binned for handling outside the box, Austria brought on a substitute keeper.
"At the end of the eight minutes, they kept the sub keeper on and no-one knew if it counted as a free sub or a proper one," said O'Connor.
|Seven offences suitable for the sin bin|
|1: Unsporting behaviour2: Dissent by word or action3: Persistent infringements4: Delaying restart of play5: Not retreating the required distance at a corner kick, free-kick or throw in6: Entering or re-entering the pitch without the referee's permission7: Deliberately leaving the field of play without the referee's permission|
Uefa are trialling the sin-bin idea at under-16s level, with any player that receives a caution for certain offences forced to leave the field for eight minutes.
"They are experimenting a bit because it is obviously something they are thinking about introducing further up the system, but it was a farcical situation," added O'Connor.
"It took about half an hour to make the substitution in the first place."
Ireland won the Development Tournament game 4-2 on penalties after the match had finished 1-1.