He then lost in straight sets in the final to Rafael Nadal , who won his 11th French Open crown .
In his third consecutive French Open semi-final , Thiem defeated unseeded Marco Cecchinato in straight sets to advance to his first Grand Slam final .
Thiem then lost in straight sets in the final to Rafael Nadal , who won Thiem 's French Open   Open crown .
In his third consecutive French Open semi-final , Thiem defeated unseeded Marco Cecchinato in straight sets to advance to his first Grand Slam final .