Wimbledon, Serena Williams - Venus Williams, what will be the 1st Set score?

Settled as Serena wins 7-5 or 7-6

http://www.wimbledon.org/en_GB/scores/cmatch/20ws.html

Background:

Background: Ladies' Singles, Final
http://www.wimbledon.org/en_GB/scores/draws/ws/r7s1.html

The Williams sisters have played 20 times before, and the series is tied, 10-10.
They are 2-2 on grass, with Venus winning in the 2000 Wimbledon semifinals and the 2008 Wimbledon final and Serena winning in the 2002 & 2003 Wimbledon final.
They are 1-1 this year, with Venus winning in the Dubai semifinals and Serena winning in the Miami semifinals. Perhaps the only relevant head-to-head lead is Serena's 5-2 edge in Grand Slam finals, although Venus won their last one.
http://tinyurl.com/SerenaVenus

Settlement details:As reported by a major mainstream news source.

Forecast history %

Serena wins 6-1 or 6-2

Serena wins 6-3

Serena wins 6-4

13%

Serena wins 7-5 or 7-6

21%

Serena wins 1st Set with other score

Venus wins 6-1 or 6-2

Venus wins 6-3

Venus wins 6-4

12%

Venus wins 7-5 or 7-6

21%

Venus wins 1st Set with other score

Settled as Serena wins 7-5 or 7-6 on Sat 4th Jul 7:19am PST

Activity: H$1,394
Predictions: 11
Comments: 0

Suspend date: Sat 4th Jul 4am PST
Settlement date: Sat 4th Jul 7:19am PST
Prediction cut-off: Predictions on this question after Sat 4th Jul 4am PST have been voided because they were made after the question could be settled

Initial likelihoods: Serena wins 6-1 or 6-2: 5%, Serena wins 6-3: 10%, Serena wins 6-4: 12%, Serena wins 7-5 or 7-6: 15%, Serena wins 1st Set with other score: 3%, Venus wins 6-1 or 6-2: 8%, Venus wins 6-3: 12%, Venus wins 6-4: 15%, Venus wins 7-5 or 7-6: 15%, Venus wins 1st Set with other score: 5%

Action history:

Created Thu 2nd Jul 4:16pm PST by

sdchargers [Power User]

Suspended Sat 4th Jul 4am PST : Suspend date reached

Settlement requested Sat 4th Jul 6:38am PST by