Ranked 200, Bhambri eked out a 6-7(5) 6-3 6-1 win over Pella, who is ranked exactly 100 places above the Indian in the ATP singles chart.
It is for the first time that Bhambri has won three matches in the main draw of an ATP World Tour event.
This will be only the second appearance for Bhambri in the singles quarterfinals of an ATP World Tour event as he had reached the Chennai Open last-eight in 2014. However, he had won only two main draw matches at that time as it was an ATP 250 event with a draw of 32 singles players.
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