[TRIVIA] It's rare that a father coaches his son in top-level soccer, let alone at the national team level. Saturday's Slovakia-USA game is believed to be the first time that father-son combinations will meet at the international level.

Squaring off against U.S. coach Bob Bradley and midfielder Michael Bradley will be Slovakia coach Vladimir Weiss and his son of the same name, a 19-year-old midfielder at Manchester City.

They could be the fourth and fifth father-son combinations at the World Cup. The others:

-- Ondino Viera, who played on Uruguay's 1924 and 1928 Olympic gold-medal teams and on its 1930 World Cup championship team, started Milton for the first three games at the 1966 World Cup. Without Milton, the Celeste got clobbered by West Germany, 4-0, in the quarterfinals.

-- Cesare Maldini was the coach and Paolo Maldini the captain in 1998 when Italy fell to France on penalty kicks in the quarterfinals.

-- Zlatko Kranjcar started son Niko in all three of Croatia's games at the 2006 World Cup, where it was knocked out in the first round.