If you're looking for manga similar to Duel Masters!, you might like these titles.
The manga features Kenta Minamii and his goal to become a great player of the Pokémon Trading Card Game. It is especially notable for taking place in the real world, rather than the Pokémon world or the GB Islands.
Yu-Gi-Oh! D Team ZEXAL focuses on humor and all characters are drawn in a chibi style. Different from the canon series, aimed at juvenlies, this manga series is aimed at younger children, and teaches them how to play the Yu-Gi-Oh! OCG with a light and humorous plot.
Ruko Kominato, who receives a WIXOSS deck from her brother, discovers that her LRIG, which she names Tama, can speak. She soon learns that she has been chosen as a 'Selector', girls who must battle against other Selectors. Should they be victorious in battle, they will be able to have any wish granted, but should they lose three times to other Selectors, they will lose that chance and lose all memory of the game. As she and various other Selectors battle it out for the sake of their wish, Ruko finds herself drawn into the dark sinister world of WIXOSS, discovering that win or lose, there is always a cost.