In 1991, he was injured in a bus accident, and used a wheelchair. He then took to wheelchair fencing. Described as "the most successful Paralympic athlete in Hungary", he won a gold medal in foil at the 1992 Summer Paralympics in Barcelona, two gold at the 1996 Games in Atlanta, a bronze in 2000, 2004, and 2008. Outside the Paralympic Games, Szekeres participated in the Wheelchair Fencing World Cup in 2006, winning a bronze medal in the individual sabre event. He has also been European Champion, notably winning gold in the individual sabre event at the European Championships in 2007. In 2008 he was ranked third in the world.