Manchester United midfielder Juan Mata said he was keen to learn from his early red card in Saturday's 1-0 Premier League loss to West Bromwich Albion.
The Spain international was given his marching orders for the first time in a career in which he has played almost 500 games after he picked up two yellow cards within three first-half minutes.
"As you can imagine, it's not easy for me to write these lines," Mata wrote in his blog on the club website.
"The truth is this is a new and strange situation for me, not easy to assimilate, but we learn from everything."
Mata also felt the sending-off was harsh.
"I have the feeling that both decisions were rigorous; that, in many occasions, we see more serious fouls that are not penalised in such a way, but at the same time I could have avoided them and I take responsibility," Mata wrote.
Louis van Gaal's men travel to Anfield to take on arch-rivals Liverpool in the last 16 of the Europa League on Thursday.