BARRANQUILLA, Colombia, April 7 (Xinhua) -- Colombia and Brazil ended the opening day of their Davis Cup Americas Group I tie here with scores even at 1-1.

Brazil's world No. 125 Thiago Monteiro defeated Santiago Giraldo 6-1, 6-2 in the first rubber, winning 83% of all points on his first serve.

In the second match, Colombia's Daniel Galan sent down eight aces as he overcame Guilherme Clezar 3-6, 6-2, 6-1.

Saturday's schedule at Parque Distrital de Raquetas on Colombia's Caribbean coast was due to start with the doubles match between Colombia's Juan Sebastian Cabal/Robert Farah and Brazil's Marcelo Melo/Marcelo Demoliner. It was to be followed by the reverse singles.

Meanwhile Argentina and Chile were locked at 1-1 in their duel in the Argentine city of San Juan.

Nicolas Jarry beat Nicolas Kicker 4-6, 7-6 (6), 6-2 before Diego Schwartzman outclassed Christian Garin 7-6 (2), 6-7 (2), 6-2.

The winners of the ties will secure places in a playoff to return to the Davis Cup world group in 2019.