Vinci 2.16, Petkovic 1.84
Vinci leads their previous meetings 2-1. They last met in January 2017 at this tournament. Vinci won in 2 close sets. Their other matches were both on hard courts in 2013 and 2011.
Petkovic has stronger overall results in the last 12 months. Vinci had a very poor season in 2017 with 10 wins from 30 matches. She has started well this week with straight sets wins over Heather Watson and Danka Kovinic. She reached the quarter finals last year and won the title in 2016.
Petkovic needed 3 sets to beat Kalinskaya in the first round of qualifying and won her second match in straight sets. Last year she also had to play the qualifying rounds and beat Begu in the main draw before she met Vinci in round 2. Her hard court results are better in the last 12 months and also in their last 50 matches.
This should be a great match and we have a fair chance of seeing 3 sets. Some value on Vinci as underdog. She seems to have put her problems behind her and I think she takes at least a set.
Lay Petkovic if she breaks first.
Update: Vinci won 6-1, 4-6, 6-3.