LONDON -- Arthur Masuaku apologized Sunday for spitting at an opponent during West Ham's FA Cup defeat to Wigan.
The defender was sent off during the Hammers' 2-0 loss at third-tier Wigan on Saturday as he reacted to a challenge from Nick Powell.
Following the fourth-round game, West Ham manager David Moyes described Masuaku's actions as "despicable."
Masuaku took to social media to apologize.
"I want to say sorry for my actions yesterday - I let down my teammates, the manager, coaches, board and the fan," Masuaku said on Twitter.
"I am very sad because the manager and coaches have put a lot of faith in me but I will work very hard to try and win that back. It was in the heat of the moment and out of character for me but I know it was totally unacceptable and I will learn from the first red card of my career."
Since being inserted into Moyes' lineup in November, Masuaku has started every Premier League game, but that record will now come to an end with a lengthy ban expected.