enjoy playing tennis

Playing tennis takes concentration.
テニスをプレーするには集中力が必要です。

enjoy playing tennis
テニスを楽しむ

have been playing tennis for quite a while
かなり長いことテニスをしている、テニス歴［の経験］が長い

hurt after playing tennis
テニスをした後に痛む

I enjoy playing tennis and singing at karaoke bars. 
If anyone here happens to be interested in one of these activities, please let me know. Thank you.
テニスとカラオケが好きなので、もしこの中のどちらかが趣味という方がいましたら、ぜひお知らせください。どうぞよろしく。

hurt one's elbow playing tennis
テニスで肘を痛める

My hobby is playing tennis.
私の趣味はテニスです。

I'm getting older. Just playing tennis for a while makes my knees quiver.
年だよなあ、ちょっとテニスやっただけなのに、膝の関節がガクガクだぁ。

My arms are stiff from playing tennis yesterday.
昨日テニスをしたので腕が痛い。

My mother persuaded my father into playing tennis every Sunday.
母は父に、毎週日曜にテニスをするように勧めた。