Manchester United defender, Noussair Mazraoui, is set for a spell on the sidelines after undergoing a heart procedure, ESPN reports. Mazraoui was taken off during the half-time of United’s 0-0 draw at Aston Villa on Sunday. He then withdrew from the Morocco squad ahead of the international break due to heart palpitations. Mazraoui has now undergone a corrective procedure and is expected to be missing for a number of weeks. Club sources insist Mazraoui’s condition is “relatively common”, while the operation has been described as “minor.” Mazraoui was sidelined for three months while playing for…