Andy has been knocked out of the World Tour Finals after Juan Martin del Potro beat Roger Federer 6-2 6-7 (5-7) 6-3.
Amid confused scenes at the 02, del Potro had to wait for minutes on court after the match for confirmation of his semi-final berth to come through.
Neither he nor the crowd knew immediately, which was a bit of a shambles.
Ultimately, it came down to the percentage of games won by all three men, so del Potro and Federer go through.
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