Unlock Message:

"You’ve stayed up 'til the wee hours to watch matches at Rod Laver Arena and Roland Garros and perfected your Johnny Mac outbursts and Sharapova shriek. Now prepare to face the likes of Novak Djokovic, slice an ace down the line, and make it a love game!"

Space for future updates

Think this is similar to the Birdie one, but tennis court venues?

Nevermind, it is an Expertise badge

So 45 tennis courts for level 10?

It would take 48 tennis courts to get to level 10.
3 for level 1 then 45 more to get to level 10.

I'm pretty sure it goes 3 venues to level 1 and 2 more for level 2 then 5 for each level after

Hmmmmm 5 different tennis courts and no badge:(

I haven't unlocked either

I don't see unlocks on twitter either

There's one unlock on twitter an hour ago. This might actually be more like Joggernaught where its one a day

This badge has been renamed to Ace Badge.

After 10 differents Checks in, the badge unlock:
I just unlocked the “Ace” badge on @foursquare for checking in at tennis courts. Game, set, match! http://t.co/NLFFM1dy

got it!

https://foursquare.com/user/1609188/badge/4fe4e8a6d5fba184e02e149d

Yeah. Scratch that. I got it with 3 ci's in a row
It might have been temoprarily disabled while they changed the name.
Also. Make sure its catagorized properly. Some idiot in my town labled all our tennis courts as "parks"

Ace badge (renamed from Grand Slam badge) can also
checkin at venue categorized as Tennis, Tennis Court, College Tennis Court

#tested ;)

Venues in Las Vegas:

First: https://foursquare.com/mobile/v/turnberry-towers-tennis-courts/4cafd8d4eb65b1f7d06d67cd

Second: https://foursquare.com/mobile/v/sunset-park-tennis-courts/4c369fb30a71c9b6098f3dc9

Third: https://foursquare.com/mobile/v/tennis-town/4f5554e7e4b0861b3241bb16

Got it in less 1 minute jijiji

I wonder why they have to change the name. "Grand Slam" sounds better.

Dissapointed they didn't mention roger federer in the message

Unlocked with only 2 check ins. Using the first two from @francisco_arq. First check in gave points for my first tennis court.

Perfect.

Got it!
Thanks for the Vegas venues Francisco!

What do they mean by "unique courts"? Wimbledon or US Open major stadiums?

@TheScientist I have been able to unlock and level up at any local venue categorized as Tennis Court. Good luck!

@TheScientist they mean courts you've never checked into before as opposed to checking into the same venue daily

Got it, thanks!

I'm assuming Tennis Stadium would count, but I'm not sure it does. Checked into 4 courts with points, 1 stadium with points, no dice.

@reenavipul you are correct, Tennis Stadiums do not count. So grab your balls and go to the court! LOL