Wenger delighted with Arsenal's mental strength after Chelsea win
But while it looked like a bad injury, Grant insisted there was no break, defusing fears of a broken metatarsal.
"It was a bad injury," Grant told Sky Sports 1. "It was bad for us, especially after losing so many players (before the match).
"He (Terry) is not feeling well but he didn't break anything. We will wait for tomorrow to see how it is.
"The (possible damage to his) ligament will wait for tomorrow."