[...] Kvitova was a commitment event so she should but not clear on that at moment. [...]
If Petra committed to P Dubai (WTA makes a secret about Top 10 Players’ Minimum Commitment Requirement Tournaments) as one of her two Premier 700 tournaments, I don’t figure out why the consequences are unclear as she fails to play due to her withdrawal (after the release of the Schedule of Play but prior to the 1st Match of the event):
From WTA’s 2012 Rulebook (p 227):
Any Top 10 Player who fails to play in a Premier 5 or Premier 700 Commitment Tournament will automatically receive zero (0) points for the Tournament and it will count on that player’s ranking as one (1) of her best 16 Tournament results.