 Complete the following phrase:  Robertson returned to form at the China Open by winning his seventh career ranking event. He advanced to the final by defeating Jimmy Robertson 50, Mark Allen 51, Marcus Campbell 52 and Stephen Maguire 65 after fighting back from 24 down. He exacted revenge over Mark Selby for his 106 loss in the final of the Masters in January by beating the Englishman by the same scoreline, moving to world number two in the process. Despite therefore appearing to be in top form for the 