Top seeded Rafael Nadal has advanced into the second round of the Rio Open after beating fellow Spaniard Pablo Carreno Busta in straight-sets.
Nadal admits his 6-1, 6-4 win wasn't easy, given the stifling heat and humidity which his gripping Rio at the moment.
"The conditions were so heavy, so difficult to serve. (We had) a lot of breaks but I was able to survive there and the important thing is to not get frustrated in that moment when you have the advantage and then he breaks me back. I stayed calm, I had every time the chance to break again, it was very important that. A very good victory for me and I am very happy."
Nadal will next take on compatriot Nicolas Almagro.
Others into the 2nd round in Rio include 2nd seed David Ferrer, fellow Spainyard Albert Ramos, Italy's Fabio Fognini and last week's winner in Argentina, Austrian Dominic Thiem.
