By STEVE DOUGLAS
AP Sports Writer
Liverpool manager Jurgen Klopp has expressed his frustration at being allowed to make only three substitutions in a match at a busy time when many squads are being hit hard by coronavirus cases. England’s top division is one of the few leagues to decide against using five substitutions for matches. That measure was introduced in May 2020 to enable teams to cope better with the congested schedule when soccer resumed following a suspension due to the coronavirus and has been retained on a permanent basis by most countries. Clubs in England voted to revert back to three subs for last season and this season but the issue has been reignited.