Argentine striker Jeronimo Neumann has signed a two-year contract extension with Adelaide United in the A-League.Neumann was one of two Argentines, along with Marcelo Carrusca, signed by the Reds this season.The 26-year-old was signed on loan from Paraguay's Sol de America but has agreed to extend his initial one-year term with the club until April 2015."Everything has been very good so far," Neumann said."It's a great club and a great city and that's why I decided to stay for a longer time here."Neumann, who has netted four goals this season, has proved a great addition to the Reds.The second-placed Adelaide host Wellington on Sunday.