United get their season back up and running against fellow Champions League hopefuls Tottenham Hotspur on Friday night, with Irwin warning his former teammate Solskjaer the Spurs game is a step into the unknown.
Neither team has played a competitive game for more than three months, due to the coronavirus pandemic. So despite many upbeat United predictions, amid the returns of Paul Pogba and Marcus Rashford from injury, Irwin is only cautiously optimistic about the restart. “They don't come much bigger than that,” he told the official United website when asked about the Spurs game.