Shanghai: Argentina's Juan Martin del Potro beats Germany's Philipp Kohlschreiber to advance to the third round of the Shanghai Masters with a 3-6, 6-3, 7-6 (4) victory on Wednesday.
The sixth-seeded Argentine had also won at the Japan Open last week and is working hard to secure his spot in the privileged ATP Tour Finals in London.
Kohlschreiber played more uncompromisingly for much of their match, smacking 50 winners to 29 for del Potro and breaking the Argentine as he served for the match at 5-4 in the third set.
But del Potro raced out to a 5-2 lead in the tiebreaker and held on for the win.
In other matches, seventh-seeded Jo-Wilfried Tsonga advanced with a 6-3, 6-2 win over Spain's Pablo Andujar, while American John Isner was ousted by Argentine Carlos Berlocq 6-4, 7-6 (4).