"He is obviously quick, but he is also consistent and mature behind the wheel – all hallmarks of a champion in the making.
"He impressed us with his approach and work ethic on those occasions he was with us last year and we are looking forward to working with him once more at the Nürburgring."
To gain the required number of FIA super license points to enter F1, Schumacher must finish at least sixth in the 2020 F2 standings.
That is an achievement the German has all but secured as he is currently 51 points clear of sixth-placed Nikita Mazepin with a maximum of 80 available.
For the romantics, Schumacher joining Alfa Romeo, the team formerly known as Sauber, would spark memories of Michael Schumacher competing in the World Sportscar championship with the marque in the iconic Mercedes C11.
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