Mehrtens played in the last TriNations test in Cape Town but missed the first two tests in the current series after tearing a cartilage in his knee while training , an injury which needed a small operation .
<response> <person>Mehrtens</person> played in the last <misc>TriNations</misc> test in <location>Cape Town</location> but missed the first two tests in the current series after tearing a cartilage in his knee while training , an injury which needed a small operation . </response>