Striker Serhou Guirassy has completed a move from VfB Stuttgart to Borussia Dortmund on a four-year contract after an additional examination of his knee had a positive outcome. The transfer was originally to go through last week but Dortmund were not satisfied with the medical regarding a knee problem. Dortmund said that Guirassy signed until 2028 on Thursday, after another check by a specialist showed that he won’t require surgery over an injury sustained while playing for Guinea. “He will now follow an individual programme for several weeks to build up his fitness, and the medical personnel …