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Newcastle United star Jonas Gutierrez has run the Buenos Aires Marathon to raise funds and awareness for a cancer charity in his native Argentina.

The midfielder, who has undergone chemotherapy for testicular cancer, took on the 26.2 mile course on Sunday in support of Fuca (Foundation for Research, Teaching and Cancer Prevention).

And afterwards he thanked his fellow runners, and Twitter followers - who used the hashtag #corroconjonás - for spurring him on during the race.

“Thank you very much to all the participants of the Buenos Aires Marathon 42k for the support and encouragement during the race,” he said.

The Toon star, nicknamed “Spider-man” also took the opportunity to personally thank Argentinian actor and comedian Dady Brieva for his backing.

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“Thank you very much for your words Dady Brieva during the race,” he said.

Jonas was part of a team hoping to raise awareness about the importance of detecting testicular cancer early, and supporting the work of oncologist Dr. Fernando Petracci, from Argentina’s Alexander Fleming Institute.

All of the team were easily seen, as they were wearing bright green, though the Magpies number 18 had a special shirt containing invisible ink that slowly revealed an anti-cancer message as the star sweated.

The marathon was eventually won by Mariano Mastromarino - but the Argentine runner nearly didn’t make it to the finish line after stewards mistook him for an intruder and tried to throw him out.

The officials at Sunday’s race, stunned to see an Argentinian surge past the Kenyan leader and title holder, Julius Karinga, ordered Mastromarino to leave the race around the 37km mark.

“They thought I was an intruder,” Mastromarino told ESPN. “‘Get out of the race, get out,’ they said. ‘Don’t stay there, this is a race’.”

The officials soon realised their mistake and Mastromarino, who narrowly missed qualifying for the 2012 Olympics in London, went on to win in two hours 15min and 28sec.