Novak Djokovic beats Tomas ##si in a third - set tie - break in Group B opener . I played , I did n't feel particularly great . Serbian saves a match point to win at the season - ending championships . Fifth seed David Ferrer upsets home favourite Andy Murray in Monday 's first game . World No . 3 Murray plays with groin injury and may miss the tournament .
Novak Djokovic beats Tomas ##si in a third - set tie - break in Group B opener . Serbian saves a match point to win at the season - ending championships . Fifth seed David Ferrer upsets home favourite Andy Murray in Monday 's first game . World No . 3 Murray plays with groin injury and may miss the tournament .