Joe Ledley was amazed to be red carded during Celtic's 2-0 defeat by Hearts on Wednesday night.
The Welshman was sent off early in the second half for a foul on Ian Black then watched as Hearts scored their second goal two minutes later.
Ledley will miss Celtic's trip to St Mirren on Sunday through suspension but is still in shock at receiving the first red card of his career.
"I couldn't believe it when the ref sent me off," he said. "I thought it was a fair challenge.
"I spoke to Ian after it and even he told me I got the ball -- there was no way I went in to intentionally hurt anyone.
"I wanted to win the ball and that's exactly what I did. That's not the sort of player I am but it seems to have come across that way.
"A few people have said the commentaries made it sound worse than it actually was. The ball was there to be won. It was a great 50-50 and both players went for it.
"I thought I won it but it's the referee's decision. Maybe he saw it differently from me.
"It's so disappointing but there's nothing I can do about it now. I just need to deal with it."
It's understood that Celtic won't appeal against Ledley's red card and suspension.
Manager Neil Lennon will be hit with a two-match touchline ban after being ordered to the stand.
Irishman Daryl Murphy could be in line for a place on the bench on Sunday after resuming full training on Monday after recovering from an ankle injury.