Mourinho was sacked in December, and since then, club legend Ole Gunnar Solskjaer has taken over and led them to five wins on the spin.
They do, however, face their first big test on Sunday, when they take on Mauricio Pochettino’s Tottenham at Wembley.
But with previous games against Cardiff, Bournemouth, Huddersfield, Newcastle and Reading all ending in victory of Solskjaer’s men, Smith has cited the freshness he believes the Norwegian has brought back to Old Trafford.
“Ole Gunnar Solskjaer has revitalised the club. He’s made it look easy,” he told the Evening Standard.