Robson has now lost both her singles matches at the Burswood Dome, but felt she improved on her first-up loss to Yaroslava Shvedova on Monday.

BBC: Laura Robson and Andy Murray

According to Australian news reports, disgruntled fans left Spears' show at the Perth Burswood Dome only three songs into the concert, complaining of a lackluster performance, apparent lip-synching and their inability to see Spears on the jumbo screens onstage.

CNN: Britney's Australian show angers fans