Important thing: the Overall Score contains the Overall Score consolidated + the training bonuses (only in career mode, not in Tennis Live Arena).

Potential - Max Overall Score (+training bonuses) - Pace of progress - Ranking (expected)

C > 76 (81) > Normal > Top30

B- > 78 (83) > Slow > Top20

B > 80 (85) > Normal > Top15

B+ > 82 (87) > Fast > Top10

A- > 84 (89) > Slow > Top5

A > 86 (91) > Normal > Top3

A+ > 88(93) > Fast > Top1

S- > 90 (95) > Slow > Top1

S > 91 (96) > Normal > Top1

S+ > 92 (97) > Fast > Top1

L > 93 (98) > Normal > Top1

L+ > 94 (99) > Fast > Top1