The Polish stopper was involved in Arsenal’s fifth goal in east London, and had few complaints after conceding the penalty that led to Saka’s goal, for his challenge on Gabriel in the air.
After being unable to follow up a strong performance away at Newcastle United, that yielded a 2-0 win, in their previous game, Fabiański and his fellow Hammers will now be looking to bounce back quickly away to Leicester City in the top flight on Tuesday night.
“He [Gabriel] outjumped me,” the 39-year-old said. “I tried to reach the ball, but he came from the blind side. I was always focused on the ball, but I think he came from a stronger position because I was jumping from standing.
“It’s a disappointing day, but there is another game in a few days and we will be focused on responding well in Leicester. Hopefully we can come back from there with a result.”