网球 (wǎngqiú) means tennis. The word is composed of 网 (net) and 球 (ball), literally "net ball." It is used to refer to the sport of tennis in all contexts, from casual conversation to sports news.
我每个周末都会去打网球。
wǒ měi ge zhōumò dōu huì qù dǎ wǎngqiú.
I go play tennis every weekend.
她从小就开始学网球了。
tā cóngxiǎo jiù kāishǐ xué wǎngqiú le.
She started learning tennis when she was little.
你想一起看网球比赛吗?
nǐ xiǎng yìqǐ kàn wǎngqiú bǐsài ma?
Do you want to watch a tennis match together?