Tsanko Rosenov Arnaudov MedM[1] (Bulgarian: Цанко Росенов Арнаудов; born 14 March 1992) is a Portuguese athlete who represents Sporting Portugal[2] at club level.

He holds the Portuguese record in men's shot put with 21.56 m. Arnaudov was born in Bulgaria in 1992.

[6][4] He broke 20 metres again in his next two meets, winning at the European Champion Clubs Cup and placing second to Jakub Szyszkowski at the FBK Games.

[7] Arnaudov made his Diamond League debut at the Herculis meeting in Monaco on 17 July, but placed last with a best put of 19.45 m.[8] He won his first Portuguese outdoor championship title the following week, defeating Fortes with 19.79 m in a close competition.

[11] In 2017 he broke his own record at the European Athletics Indoor Championships in Belgrade, with a 21.08 throw, which gave him 4th place.