In tennis, there is no halftime. Breaks occur between sets, which consist of a player winning a total of 6 games, winning by two. Ex: A game consists of the first to 4 points. The winner of 6 games (must be ahead by 2) wins that set. Then there is a short break. A women's match is best 2 out of 3 sets. A men's match is best 3 out of 5.
There is no halftime in baseball because there are frequent short breaks in between the innings. Instead of a halftime, both the players and the baseball fans get to enjoy a break in the game during the seventh-inning stretch. The stretch was created in 1910 when President William Howard Taft, on a visit to Pittsburgh, went to a baseball game and stood up to stretch in the seventh inning. The crowd, thinking the chief executive was about to leave, stood up out of respect for the office.