When you have no credible target, the lack of end product isn't really your fault as a winger. And no, I don't think anyone operating as a winger should be expected to score goals. Occassionally, but that's not the role. The role is to exploit or draw other players to the wide parts of the pitch. If they bring two people over there, fantastic. Move the ball to someone else with time and space to exploit other areas. Besides the fact that he started the sequence for our goal, he was a serious threat and created space for other players. Now if you've got one v. one, yes, you should run at guys and beat them every now and then, which he does. No winger beats their guy clean in the PL THAT often. His power and pace combination is rare and I think if we give him a bit more run and if Tosun can play, we will see a lot more production.
You also have no idea what tactics they are playing in terms of where they want him to cross the ball. I also don't think one can expect a winger playing against a good back to have the time to pinpoint crosses every second. Taking a quick look and putting it in a dangerous area is about all you can do. You have to rely on SOMEONE's ability to adjust to the ball a little bit. We literally have no one. Maybe Tosun will help.