在巴黎奥运会乒乓球混合双打决赛中，中国组合王楚钦/孙颖莎以4比2战胜朝鲜组合李正植/金琴英，为中国乒乓球队夺得本届奥运会乒乓球项目首金，同时这也是中国乒乓球队在混双项目上的奥运首金。在观看比赛时，有没有发现选手会不时擦一下桌子，这是为什么呢？球员的球拍有什么讲究？左撇子球员在打球时更有优势吗？
Why do table tennis players always brush the area near the net with their hands?
This is one of the most asked questions on our channel, too.
And the answer has two parts.
When you play table tennis, It's very common that your hand sweats because of all the time being in contact with the racket.
So between the points, it's very usual that players go wipe the sweat off of the hand and then continue playing.
And the reason why the hand is often dried here is that you don't want the playing area to be wet.
The second part to this answer is that drying the hand on the table is also a mental thing for the player.
So often before the serve or the receive, players want to take a moment to refocus before the next point.
Why do table tennis rackets have a red and a black side?
This rule came in the 1980's because people were using two different rubbers but with the same colour.
