Not only will it affect his preparation, it's probably going to affect his performance the deeper he he goes into AO. How much, remains to be seen.I guess the injury isn't serious enough to make him miss the AO, but it will probably have a negative effect on his preparation. The media is generally not trustworthy at all with such issues, they even reported Thiem was in danger of missing last years AO after Bresnik and Thiem himself confirmed he was entirely healthy (and some people here valued this article pretty highly as a reminder).
Yeah I agree. He did use the word "pull" when referring to the injury but I think its a case of lost-in-translation and he just didn't pick the most appropriate term to use in english.Sounds like it's just tightness. If it he an actual strain he'd probably have almost no chance of being fit.