Vidosic said that concern from Mpome’s team-mates may have had an impact on their performance as Brighton chased an equaliser.
Brighton trailed after Marisa Olislager’s own goal in the first half but improved and forced several saves from Arsenal keeper Daphne van Domselaar.
But they failed to create many openings after Mpome’s injury, with the home side coming closer to scoring in the final moments.
“It’s never nice to see your team-mate get hurt,” Vidosic said. “Maybe that did play a part, fatigue as well.
“We tried to push everyone as much as we could in a safe way, but maybe it took the rhythm out of the game with the 10-minute pause.”
Mpome joined Brighton from WSL champions Chelsea in the summer and was making her fifth league appearance for the Seagulls.