30-30 on the Duque-Marino serve, Robson can smell blood here.
Great serving now from Robson after that shaky start. 30-15.
Bit of a worry as Duque-Marino works her way to break point but an unforced error sends it to deuce.
But Robson moves 0-30 ahead, can she close it out this time?
Two set points for Robson as Duque-Marino goes long.
A huge sigh of relief from Robson after taking that opening set.
Would you believe it! A Duque-Marino smash to win the game goes straight back from Robson and the Colombian put it into the net. Deuce.
Highly entertaining rally culminates in Duque-Marino flicking the ball over the net to stay in the game at 30-15.
Next on Centre Court is a third round match between Nicolas Almagro and Jerzy Janowicz so they are playing from the start. Could be a long one too...
All too easy for Robson and she has three break points.
40-0 Robson. THREE match points.
After a nervy start Robson was thoroughly convincing and moves through to face New Zealand's Marina Erakovic in round three.
A real statement from Robson, comfortably winning in the second round of Wimbledon but still claiming she could have played much better.
Robson has a doubles match later today, weather permitting, and is likely to return to face world number 71 Erakovic tomorrow.
Thank you for following the live blog this lunchtime. I will be back in a few hours when Andy Murray looks to book his place in the last 16 by beating Spain's Tommy Robredo.