After playing for clubs in Slovakia and the Czech Republic, he spent four and a half seasons at Middlesbrough of the Premier League from 2001 to 2006.
Amid rumoured interest from Inter Milan, he eventually signed for English side Middlesbrough on 12 April 2001 for £2.1 million on a five-year contract.
During his time in the Premier League, he scored in wins over Chelsea, Manchester United, Liverpool and Tottenham Hotspur.
The 2005–06 season saw Németh turn down numerous transfer offers, including UEFA Cup winners CSKA Moscow.
[citation needed] He faced competition up-front that season from Yakubu, Mark Viduka, Jimmy Floyd Hasselbaink and Massimo Maccarone, leading to his exit in January.
His debut was a 4–0 friendly win against Belarus at the Štadión pod Zoborom in Nitra on 2 February 1997, replacing Róbert Semeník for the final 26 minutes.