United came from behind to beat LASK 2-1 at Old Trafford on Wednesday.
Gillespie claims moving to United can propel Sancho to become a 'world superstar'.
"We didn't see the best of Alexis but he's a top professional and we just wish him all the best."
Ole Gunnar Solskjaer has given eight Manchester United academy graduates debuts this season.
Alexis Sanchez "is entirely owned by Inter," according to the club's chief executive.
The new Man Utd kit is out and we're fans. Although it might just be because Bruno Fernandes was modelling...
Also... a manager XI, Prem play-offs and the remnants of Pep's lunch.
Man United have now 'refused to be bullied' by two smaller and less well-off clubs in the space of two days.
United are willing to pay £63million up front for Sancho, with the remaining fee paid in instalments.
Solskjaer was very keen on bringing Bellingham to Old Trafford.
Is Ed Woodward still too concerned about making a statement and proving Man Utd have a transfer pull?
De Gea signed a new six-year contract at Old Trafford last season.
This deal is still a long, long way from being completed...
Dozens of high-profile players have already been linked with a summer move to Man Utd.
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