These tight the same, although both of them get a run of meanings. They could imply that you're meliorate at tennis than other populate in the room, or on the team, or at your school, or in the reality. Alternatively, they could mingy that you're ameliorate at tennis than at any of the former sports you sport - without specifying that you're best at tennis than former multitude. So, "It is the best ever" agency it's the outflank of entirely time, up to the demo. "It was the best ever" way eit...