Saturday 4 July 2009 14.00 BST
This timeplot shows the live betting odds taken at 30 second snapshots from Betfair plotted over the course of the 90 minute match. Significant events, ie. the things that have some bearing on the outcome, and therefore the betting market, can be seen as sharp inclines or declines along the x-axis as the odds rise or fall.
The red line shows Venus the clear favourite right up until the first set tie break at 3pm after which the odds were reversed as the match gradually slipped away from her over the next half-an-hour.
14:38 Venus *4-4 Serena Venus ramps up the power on her return, jumping out to a 30-0 lead, and peppering the baseline with some ferocious groundstrokes, she earns two break points. Serena's second serve kicks up viciously to force the error, before lil sis comes galloping to the net. Venus misses by inches with the pass and Serena comes through with two aces on the trot.
15:02 Venus 6-7 (3-7) Serena Serena nudges ahead, a rocketing forehand making Venus net for 3-1. HawkEye challenge on the next point, but Venus's backhand brushes the baseline. A crunching off-forehand means Serena swaps sides at 4-2. At 5-2, Serena comes up with a brutal combination of groundstrokes, finding the angle to wrong-foot Venus - leaving her sister on the ground. Serena doesn't see that, she has turned around and is pumping her fist. She misses the first set point but then produces a stunning, stunning backhand lob to claim it. More fist-pumping. Brilliant stuff from the younger Williams.
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