I am new to Tennis Clash, and could not fully figure out the cards method and how to exchange cards. I have earned several cards multiple times. For instance, I have «The warrior» card saying 467/400, «The machete» 57/2, «The raptor» 208/50, «The hunter» 182/2, «The rocket»228/50, «Lean protein » 10/4, «Increased hydration» 71/4, and «Sprint» 4/2. Does this not mean that I have exceeded the top limit and have excessive cards? How can they be used? How can they be traded/exchanged or otherwise contribute to my game power?

Any assistance/guidance will be appreciated,