The young Ivorian has been settling into life at Old Trafford after having joined the Red Devils from Serie A side Atalanta earlier this year.
Diallo scored his first goal for Manchester United when he came off the bench at half-time during the Red Devils’ 1-1 draw with AC Milan in the Europa League this month.
The 18-year-old arrived at Old Trafford with a promising reputation and he has been widely tipped for success on the big stage in the coming years.
Galli, a former Italy and AC Milan goalkeeper, helped to engineer Diallo’s move to Atalanta – and he feels that the future is bright for the talented teenager.