United completed a deadline-day deal for Telles after agreeing a £13.6million fee with FC Porto.
The 27-year-old brings plenty of experience with him to Old Trafford having made 194 appearances for the Portuguese outfit and earning three caps for Brazil.
Speaking exclusively to 888sport, former Red Devils defender Silvestre backed the full-back to hit the ground running.
‘I have followed Alex (Telles) for quite a while so I have seen his progress at Porto and the Brazilian national team,’ the Frenchman said. ‘He is going to do well at United.
‘At 27 years old you cannot expect him to take a while to adapt because he knows his strengths and his weaknesses and what he can bring defensively into the back line.’
Ole Gunnar Solskjaer was keen to add another left-back to his ranks in the summer with 20-year-old Brandon Williams the only player providing competition for Shaw last season.
Silvestre admitted that Telles’ arrival could help push Shaw to a higher level while he flagged up the English full-back’s defensive positioning as the one key area he needs to work on.
‘Nowadays the top teams have two internationals in every position competing for the one spot,’ Silvestre added. ‘For Luke he must keep working hard and stay focused.
‘With Luke the area where he can perhaps improve is his defensive positioning, especially with Harry and their communication. He can improve his position to protect the space.
‘That is important because you need to stop an opponent going into that space. For the rest he has the maturity and experience to manage many, many situations.’
Read the full 888sport interview with Mikaël Silvestre here.