However, Onana's hopes of ousting Lammens could be dashed if Carrick remains on as United boss. Carrick, who has overseen five wins and one draw from his six games in charge, spoke highly of the summer signing following Monday's 1-0 win at Everton.
"For me, as a goalkeeper, to be reliable, to be trustworthy. Instead of creating the chaos, you want them to take the chaos away and calm things down I think Senne is that," Carrick said after the narrow victory at the Hill Dickinson Stadium.
"He’s quite quiet at times and unassuming, but he’s got a real steel in this. To step in, it’s a big, big role for some. And others are talking there about coping and just being comfortable in the environment. Sometimes it takes time, sometimes not. But how he’s gone about it at the moment is that calmness, that composure. I think it does help those in front of him an awful lot."
United's victory over the Toffees marked Lammens' fifth clean sheet of the season, a record he'll hope to add to when they face Crystal Palace on Sunday.