Pironkova won their only previous meeting. That was in 2007 on clay and she won in 3 sets.
She has had some good wins this year and beat Vekic in the first round this week. That was her first win in Indian Wells since 2010.
Bacsinszky has not been great this year but in her last tournament, Doha, she reached the quarter finals.
This is likely to be a close match and 3 sets seem likely. A little value on Pironkova at the start.
If Bacsinszky continues to improve she should get the win. Back her if she is broken first.