In the 1999 Pan American Games in Winnipeg, Borges led Brazil to its best  Pan American Games swimming result of all time. In the 4×100-meter medley, a team comprising Borges, Alexandre Massura, Fernando Scherer and Marcelo Tomazini won the medley relay for the first time in the Pan's history with a time of 3:40.27, breaking the  Pan American Games and South American records and securing a place in the 2000 Summer Olympics.
At the 1999 Pan American Games in Winnipeg, Borges led Brazil to its most successful swimming performance ever. The team of Borges, Massura, Scherer, and Tomazini won the first ever medley relay at the Pan American Games with a time of 3:40.27, breaking both the Pan American Games and South American records and qualifying for the 2000 Summer Olympics.