28 May – 11 June 2017

Lucas reached the 3rd round of Roland Garros for the 1st time of his career. In the 1st round he defeated french fellow player Julien Benneteau in a 5 set battle on center court. Then he won against Tomaz Belluci in straight sets. In the 3rd round, he played against Albert Ramos-Vinolas, the lefty from Spain who is always dangerous on clay. Lucas lost in 5 sets, cramping in the last one.