Portugal remain without a win at the 2016 European Championships after they drew 0-0 with Austria in Paris on Saturday evening.
Having drawn 1-1 with Iceland on Tuesday, Portugal headed to the Parc des Princes in search of three points to take them closer to the knockout stages of Euro 2016.
However, it proved to be another frustrating night for Fernando Santos' side, as they drew a blank against an underwhelming Austrian side, with Cristiano Ronaldo enduring a night to forget.
The Real Madrid superstar missed a host of chances before winning a penalty in the second half - but he could only strike the base of the post, and had a header chalked off for offside as the game ended in stalemate.
Whilst Ronaldo struggled, the same can't be said for holding midfielder William Carvalho, who was brought into the side at the expense of Porto star Danilo Pereira.
The powerful defensive midfielder has been starring with Sporting in his native Portugal, and he again showed his quality with a superb display in front of the back four, nullifying Austrian attacks and keeping the ball well in midfield.
After his performance against Austria, United fans took to Twitter to praise Carvalho, with many urging Mourinho to make a big move to sign the midfielder.
It remains to be seen whether United do make a move for Carvalho, but judging by these responses on Twitter, many supporters would love to see him in the famous red shirt.
Why is William Carvalho still at Sporting? Sign him up Mourinho!— Stephen Webb (@stephenwjwebb) June 18, 2016
If Mourinho wants a solid DCM then get Carvalho— Zubair Siddique (@_Zoobz) June 18, 2016
William Carvalho has been so good would take him at United— AM9 (@AMartiaI9) June 18, 2016
So this is the W Carvalho we've been linked to? He's a good player, hope we're interested, hope we get him #mufc— Bongani (@Bonganisway) June 18, 2016
Would you like to see United sign Carvalho?