Head to heads ate 1-1. Their last meeting was in September last year. Duque Marino won in 3 sets on a hard court. Both their matches went to a deciding set.
Bertens has lost just 2 of her 15 clay matches this year. She had a tough semi final with Goerges. It could have gone either way and in the end she won in a third set tie break.
Duque Marino had a good win over Siegemund in the second round and looked like she was going out in the quarter final but fought back well in a tight 3 setter. That match was delayed from the day before and she had to then play her semi final in the same day. She beat Beck easily in straight sets.
I am going with Bertens to take this but think she will need 3 sets. Back her if she is broken first.