A prefix is a series of letters, or a word, that is added to the  beginning of a word and changes the meaning. For example, in the  word midnight, mid is the prefix.
The more vigorous an activity, however, the more calories youâll burn. Changes in body weight are related to both the duration and intensity of play. Playing singles tennis at average intensity expends 300-600 kcal/h, while high intensity tennis training expends 450-900 kcal/h. Diabetes. The incidence of diabetes worldwide of persons aged 20 or above in 1995 was 4% (approx. 135 million), a figure that will increase to approx. 5.4% (300 million people) by 2025.
The next highest total possible is 1,500 ranking points to an undefeated ATP Tour Finals champion like Roger Federer in London 2011. The next highest possible totals for the singles champions are as the tournament category suggests Masters 1000 (1,000 points), ATP 500 (500 points) and ATP 250 (250 points).