If the governing body of tennis was anything like the AFL, they'd already be discussing possible rule changes that could make more matches like that one.
Players have to pass a post-it to the chair ump telling them what shots they're going to play in the rally before it begins.
If you're serving and you hit the ball out of bounds, your opponent gets to serve out the game.
You don't have to wait for your opponent to get back in position before serving again.
Fireworks, loud music and cheerleaders after every point (fan engagement).
Draft and free agency for the Davis Cup.
The ball slows down when it bounces - abolish the requirement for the ball to land in court to speed the game up, thus slowing it down.
Cameras on the ballkids' hats, mic up the players (volume down on Sharapova?).
Make Hawkeye low-def so you're still not sure whether the ball was in or not.
Add developing markets to Davis Cup (North Korea = untapped market), funnel large sums there to promote tennis until successful and guarantee profit.
More sponsorships ("That chair overrule brought to you by
Wite-Out.")
Change rules mid-tournament.
Substitute rule to prevent injury-related forfeits.
Expand the size of the court so that trick shots are easier to land.
Bring back woodern racquets!
Hold all matchfixing and PED hearings in private - exonerate accused but punish them for 'unrelated administrative issues', allow them to serve suspensions in offseason.
Give David Haggerty's brother a commentating job despite lack of experience, talent, face for television and charisma.
No outsiders!
Theme rounds for Grand Slams.
More Grand Slams, fewer World Tour tournaments.
Clash strips.
You're welcome ITF, I'd prefer my payment in bearer bonds.