Sentence:  And this friendly was not without its injury worries, with defender Gary Cahill substituted early on after a nasty, needless push by Dries Mertens that caused him to <WSD>collide</WSD> with goalkeeper Joe Hart, an incident that left the Chelsea defender requiring a precautionary X-ray at Wembley. 
Meaning of the word marked with <WSD> tags:  To impact directly, especially if violent.