Former world number one Rohan Bopanna and his new Colombian partner Nicolas Barrientos bowed out of the Australian Open mens doubles event with an opening-round loss to the Spanish team of Pedro Martinez and Jaume Munar in Melbourne on Tuesday. Bopanna and Barrientos went down 5-7, 6-7 (5) in a match that lasted close to two hours. The 14th-seeded Indo-Colombian pair began on a promising note but faltered in crucial moments, allowing the Spaniards to capitalise and secure victory. Bopanna and B