He said: "It's something, something uncomfortable he felt in the last minutes, before the goal he felt something".
Right-back Danilo was at fault again six minutes later when Shakhtar extended its lead, a ball over the top from Marlos sending Ismaily clear and, when Ederson raced out of his box without getting the ball, his finish into the gaping goal was straightforward.
That was in no small part due to the presence and contribution of youngster Edimilson Fernandes, whose energy allowed West Ham to counter effectively and compete in the engine room against one of the best sides in Europe.
Toure, 34, is likely to feature as Guardiola makes some changes for the final Group F game in Kharkiv. I don't know whether he will recover for Sunday. "I can promise you we are going to try to win this game".
Manchester City have been fabulous, breaking records in the league and their fitness has been incredible with how they keep the ball and pick teams off.