Kozlov is 60 in the world ITF, playing a limited schedule since he is a 14 year old. There should be a limit as to how many tournaments he can play. So being 60 ITF at 14 with a limited participation goes to show that he is capable of more than his ranking would suggest. He has wins over top 10 ITF guys and has faced serves north of 120 miles an hour. Neutralizing Serena s power shall not be a problem for Kozlov, moving her around with his variety of shots to places on the court where she rarely finds herself is also a given. He will outplay her, I presume. However, will he be able to outcompete her. She is, after all, Serena. Tough call but if I were to bet money, I would not bet against 14 GS even though i Think that Kozlov will beat Serena 8 out of 10 times they will play. That one match they will play where the winner takes all, I would have to go with a proven record of Serena. Kozlov is used to beating boys or men, where in every match he enters, he has an advantage being the underdog. Here, the field is somewhat leveled and he plays a woman that according to his accomplishments he should be able to beat. Psychological aspect will take over an actual tennis ability and skill and Serena will step up and probably win.