Watford boss Sean Dyche has questioned whether appealing against Scott Loach's red card in Monday's 2-0 loss to Portsmouth will be worthwhile.
Loach was sent off for handling outside of his area following a tussle with Pompey striker Mark Futacs.
"We'll have to look at it," Dyche told BBC Three Counties Radio. "But how many of those appeals work?
"I'd like to think people look back and realise [it was the wrong decision]. But it doesn't always happen."
He added: "You're looking for people to be honest about what happened. We'll have to wait and see."
Dyche was adamant that his keeper had handled the ball after being fouled by the Portsmouth forward.
And, with seven minutes remaining and Pompey leading 1-0, the hosts were able to score a second against their depleted opponents.
"It's an impossible sending off," he said. "How it's not a sending off or even our foul is a surprise to me. I've seen it again and it's still a surprise to me.
"Let's just say there were circumstances that made it a lot tougher for our team."
Loach was replaced by youngster Jonathan Bond, who is now likely to start Saturday's FA Cup visit of Bradford, with Rene Gilmartin having extended his loan spell at Yeovil by a further month.
And Dyche was impressed with the seven-minute cameo from the 18-year-old.
"He's a fine young man," said the Hornets boss. "He comes on and takes a nice cross and to be honest he's unfortunate to concede.
"He's been in and around us for a few weeks after coming back from a loan spell at Forest Green and he's maturing and is a fine prospect."
Watford could recall Gilmartin from the Glovers but have so far made no intention of doing so.
Meanwhile, young Watford midfielder Chez Isaac has joined Tamworth on a month's loan.
The 19-year-old came on as a first-half substitute in his new side's 2-2 draw with Alfreton on New Year's Day.