The unseeded 14-year-old demolished Romana Tabakova 6-2 7-5 on a packed Court Three to continue her remarkable progress at the All England Club.

Tabakova's lack of sportsmanship was exposed in the eighth game of the second set when she bamboozled the home favourite with a sly underhand serve as the tactic left Robson stranded at the baseline and earnt the petulant Slovakian a chorus of boos from unimpressed spectators.

American top seed Melanie Oudin and Serbia's Bojana Jovanovski, the ninth seed, have already fallen victim to Robson this week and the Australia-born Londoner has yet to drop a set.

She raced into a commanding lead early in the opening set, breaking Tabakova in the second game and barely looking back.

The Czech was being overwhelmed, struggling to cope with the ferocity of her opponent's precision from the baseline.

Two set points were saved in the eighth but Robson could not be denied on the third.

Serving to open the second set, her accuracy deserted her as she fired a routine winner wide to give Tabakova an early break.

The wobble continued into the third game when she conceded another break point but a powerful forehand dug her out of trouble.

Tabakova was clearly unhappy as she surrendered her serve in double quick time. She was back in trouble in the 12th and fired match point into the net to keep alive Robson's bid to become the first Briton to win the Wimbledon girl's title since Annabel Croft in 1984.