The Aston Villa man has clearly been impressed with what he has seen from the Portuguese teenager.
Sanches made his competitive debut for his country in the 1-1 draw with Iceland in their opening group game, and after being named man of the match in the last-16 victory over Croatia he was named in the starting XI for the quarter-final clash with Poland.
The 18-year-old put in a dazzling first-half performance which was capped off by him smashing home the Portuguese equaliser from outside the box via a slight deflection.
The hugely talented teenager was signed by Bayern Munich in May, with the German giants reportedly beating Manchester United to his big-money signature, and judging by his performances thus far on European football's biggest international stage, the Red Devils will be kicking themselves for missing out.
Sanches has understandably gained numerous admirers for his enterprising performances, and one of those appears to be Aston Villa midfielder Jack Grealish, who tweeted his appreciation of the star's talents during the first half of the Poland clash.
Renato Sanches is unbelievable for a 18 year old— Jack Grealish (@JackGrealish1) June 30, 2016
Grealish wrote: "Renato Sanches is unbelievable for an 18-year-old" and it certainly appears hard to argue with that assessment based on what we have seen so far.
Sanches burst onto the scene at Benfica last season after being promoted from the side's B team midway through the campaign, and his impressive and mature displays have already seen him become one of the most hotly-tipped young stars in European football.
Thanks to the midfielder's equaliser, Portugal and Poland were level at 1-1 at half-time of their Euro 2016 quarter-final on Thursday night.