The 26-year-old only joined Porto this summer, but he is already being tipped for a big-money move and follow in the footsteps of fellow countryman Radamel Falcao - now at Atletico Madrid and considered one of the finest strikers in the world.
Martinez has scored 11 goals in his first 12 games, meaning he has beaten the previous records of Falcao, Hulk and Lisandro Lopez.
But the Colombian insists he is more than happy with Porto and is calm about his future, despite recent links with the likes of Chelsea, Liverpool and Barcelona.
He told OJogo: "Chelsea and Barcelona? Sincerely I have not spoken with anybody but this is a good signal about my performances in the Portuguese Liga.
"Rumours are normal because I am working with success in Porto and scoring goals but I am calm, if the papers say there are offers that does not worry me.
"Now I am focussed exclusively on my work for Porto, I prefer to ignore the rumours about clubs being interested."