Melbourne, Jan 21 (Reporter) British pair Henry Patten and Olivia Nicholls are into the Australian Open mixed doubles semi-finals after victory over Irina Khromacheva and Jackson Withrow. Patten and Nicholls reached their first Grand Slam semi-final as a duo with a 6-2 6-2 victory over the Russian-American pairing, the BBC reported. They will face Australian wildcards Kimberly Birrell and John-Patrick Smith for a place in Saturday's final. Patten is still in the men's doubles tournament, with he and Finnish partner Harri Heliovaara taking on France's Edouard Roger-Vasselin and Monaco's Hugo Nys in Wednesday's quarter-finals. Julian Cash and Lloyd Glasspool are also in men's doubles action on Wednesday against German pair Kevin Krawietz and Tim Puetz...////...