To dream that you are playing tennis represents changes or challenges in your life. You need to actively assert yourself and prove yourself time and time again.
Alternatively, playing or watching tennis indicates that you are unable to commit to a situation or decision. You are literally going back and forth between two choices. Perhaps the dream is trying to tell you that “the ball is in your court.”
Since one of the score in tennis is denoted as “love”, then the game of tennis may be a metaphor for a romantic relationship or a courtship.
To see a tennis court in your dream implies that you need to choose a side in some challenge or argument.