This will be the first time they have played.
I didn’t see Vesely’s match with Thiem but was very surprised that he won never mind that he won in 3 tie breaks. He hit 14 aces and was broken just once.
Sousa was moderate favourite in both his matches. He needed 5 sets to beat Tursunov in the opening round and 4 sets to get past Novikov.
Vesely has a better record on grass and his game is more suited to this surface. He starts around 1.47. Wait for 1.70 .
If Vesely can serve as well as he did in the last round I don’t see Sousa getting too many chances. 4 sets seems the most likely outcome.