Manchester United have scouted Porto and Portugal goalkeeper Diogo Costa at least half a dozen times this season as Erik ten Hag considers his long-term options to be the club's number one, 90min understands.
Ten Hag and United's decision makers have a big choice to make in goal over the coming months, with current number one David de Gea out of contract in June 2023.
United have an option to extend the Spaniard's contract by a further year but the decision to proceed on that is complicated by De Gea's salary, which sits among the club's most expensive contracts at around £375,000 a week. Long-term concerns over De Gea's capability to adapt to Ten Hag's system mean he may no longer justify the earnings.
