Isner over Beck 8/13
Really surprised with your pick here, ivan. Beck is after succesful Q-tournament and he's very unattractive tennis player to play for Isner. First of all, he's lefty. Second, he's baseline grinder who try to reach every ball. Isner is too dependend on his serve, his footwork is poor rubbish. Basically for 8/13 you accept the price where Isner will basically outserve Beck but if we consider 5set format it's not difficut to find out that in the 5th set format Isner will be almost dead in his legs (in a typical Karlovic's way).
Beck with +4 handicap for 1.85 looks way more pleasant here