Teacher:In this task, you are given a context paragraph of the tweet and question. Your task is to generate right answer of given question based on given context tweet paragraph.
Teacher: Now, understand the problem? Solve this instance: Context: Help us congratulate IMG alum @keinishikori on reaching semi-finals of the @Barclays @ATPWorldTour Finals! #IMGFam IMG Academy (@IMGAcademy) November 13, 2014 Question: what happened at atp world tour?
Student:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
kei nishikori reached semi-finals.