Ipswich striker Pablo Counago must serve a three-match ban after his appeal against his red card at Scunthorpe on Saturday was rejected by the Football Association.
The Spaniard was sent off for violent conduct after clashing with Iron defender Jack Cork during Ipswich's 2-1 win at Glanford Park.
Cork, who was also sent off, thrust his hand into Counago's face before Counago brushed it away, although Scunthorpe manager Nigel Adkins later claimed that the forward had spat at Iron defender Andy Butler.
Counago argued that he spat out blood after being caught in the mouth by Butler's elbow and that it was not directed at his opponent.
But although Ipswich appealed against Counago's dismissal, the suspension has been upheld and the 28-year-old striker will miss games against QPR, Colchester and Cardiff.
Counago is Ipswich's joint-top scorer in the Championship with 12 goals so the news is a big blow for Town as they aim to climb into the play-off places.