It depends on what match it is. Big matches can cost a lot but little matches are in the thousands.
Yes, even during the Us Open many players take bathroom breaks! When you watch the matches on television that is usually when they switch to commercial.
The consensus seems to be that tennis players wear the same outfit for an entire tournament because of their sponsorships with different brands. The company/brand will want the tennis player to be seen as much as possible with clothes bearing their logo.
They likely change the train timetable at Wimbledon station during the tennis matches because it must be very quiet during tennis, and trains make a lot of noise.
Tennis players use tennis balls during their match.
Tennis players eat banana during the match because bananas have lots of potassium in them. Tennis players dehydrate a lot during the match. Due to dehydration, players lose lots of salts especially potassium too. Losing potassium with make their muscles cramp. To relieve themselves from cramping, tennis players eat bananas during the match
Tennis affects people's lives by giving them a fun, healthy activity to do. Professional tennis players add to the economy through their matches and tournaments.
The tennis matches were held at Wimbledon.
Tennis matches have varying amounts of time. Most professional tennis matches that are played at 2 out of 3 sets last about an hour and a half (plus or minus a half hour depending on the skill levels of both players).
They get thrown away or given to a family member if wanted.