India's Rohan Bopanna, playing with his fourth different partner of the season, joined forces with Marcin Matkowski to reach the doubles semifinals of the Dubai Duty Free Tennis Championships. The unseeded Indo-Polish pair knocked out Romania's Florin Mergea and Serbia's Viktor Troicki 6-3, 6-4 in thequarter-finals of the hard court tournament. This is the second best performance of the season for Bopanna, who won the season-opening Chennai Open withcompatriot Jeevan Nedunchezhiyan.