GMG Racing celebrates first American success for Audi R8 LMS GT4: James Sofronas and Alex Welch stood on the top step of the podium in the SprintX season opener of the Pirelli World Challenge. The two Americans from Team GMG Racing won the second single race of the opening event on the circuit of Austin, Texas, achieving the first victory for the new customer sport race car in North America. After the one-hour race, the advantage of their Audi R8 LMS GT4 was 3.3 seconds. With 37 entrants the GT4 category in the Pirelli World Challenge is one of the best-filled GT4 classes worldwide. Sofronas, who is both the team’s owner and a driver, is ranked in third place of the standings after two of a total of eight individual races in the GTS class of the SprintX classification.