Derby County keeper Jonathan Mitchell is determined to prove he can provide strong competition for Scott Carson's place in goal.
It was the 20-year-old's second senior appearance for the Rams.
"I'm enjoying it, hopefully doing well in training and pushing Scott all the way," he told BBC Radio Derby.
"We'll hopefully improve each other as that's what we need to do. You've got to give the manager headaches - good headaches - on selections.
"If we can keep pushing each other in positions all over the pitch then we can only improve."
Derby were well beaten by Liverpool, who comfortably secured a place in the fourth round.
Ragnar Klavan opened the scoring before Philippe Coutinho and Divock Origi added further goals in the second half.
"Hopefully I'll keep learning with (more) games and keep performing," said Mitchell, who spent a month on loan at Luton last season.
"It was a learning experience against one of the biggest sides in the world. It's good to test yourself against a top team.
"It's what you aspire to be - you want to be at the top. You want to test yourself week in, week out against top players.
"The result wasn't what we wanted, but I enjoyed the occasion."