But substitutes and other unused squad members went through a full session at the training base at Carrington.
The two centre-backs have been described as two of the best homegrown defenders in the country.
They were both promoted to the first team by Louis van Gaal last season but are yet to make their debuts.
When asked about Tuanzebe’s potential in July Mourinho said: ”You can play 90 minutes or one minute. Sometimes one minute is enough. With Axel, 10 minutes is enough! The potential is there, you see it immediately.
GETTY
Axel Tuanzebe joined Manchester United first team training today
GETTY
Tuanzebe could feature for United against Stoke on Sunday
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"You know him better than me because you know him for a few years but if anyone sees him for the first time, ten minutes is enough to see the potential."
United take on the Potters at midday on Sunday with Mourinho looking to win his fourth game in a row.