Most of the time, you see tennis players when they're tense, hot and sweaty as they ply their trade.
But Davis Cup, in addition to providing great team bonding amongst countryman who compete against each other the rest of the year, offers another opportunity: matching suits.
And you know the players love to look good, because they're Tweeting and Instagramming photos of themselves in their official dinner garb all over the place.
As the action gets under way around the planet Friday (it's already started down in Australia), here are some examples. Can you pick the best-dressed?
Above is team Serbia, taken by Nenad Zimonjic. Clearly they're surviving without Novak Djokovic.
The U.S. team, as is often the case, is a tad underdressed - even captain Jim Courier, who is tied and tucked even on court during matches, downshifted a bit. (Hey, Sam, tuck it!)
The @USDavisCupTeam enjoyed their time tonight at the Official Dinner in Chicago! #DavisCup pic.twitter.com/2o0laO2m6G
— US Davis Cup Team (@USDavisCupTeam) September 11, 2014
Team Canada does it right:
YES! #TENNISisCANADA my friends with @milosraonic @VasekPospisil @FDancevic Marty and the Chief @Tennis_Canada pic.twitter.com/RKrKNlRsF6
— Tennis Kev (@tenniskev) September 11, 2014
Someone's missing in Team Switzerland (Stanley?) - but it wasn't the guy who supplied the hair product. We're thinking Armani or Hugo Boss here; Fed's not going to wear off-the-rack.
Heading out to Team Swiss dinner with the boys. Happy birthday to my man @mchiudinelli33 ! #swiss #plus pic.twitter.com/r4HhZifRzn
— Roger Federer (@rogerfederer) September 10, 2014
Team France - spectacular as always.
Dîner officiel ce soir ! Official Davis Cup dinner #DavisCup pic.twitter.com/8gji0xcoQL
— Jo-Wilfried Tsonga (@tsonga7) September 10, 2014
We concur with Jürgen Melzer's assessment of Team Austria:
Austrian team before the official dinner!looking outstanding ? pic.twitter.com/lT4362y9Z4
— Jurgen Melzer (@jojomelzer) September 10, 2014
Team Australia has some big lads.
Aussie @DavisCup team looking sharp! @SamGrothTennis @TKokkinakis @NickKyrgios #Hewitt #Guccione #Rafter#Roche#AUSUZB pic.twitter.com/9J8IR8o0OG
— TennisAustralia (@TennisAustralia) September 10, 2014
Team Italy - they have to play Fed and Wawrinka, but at least they look good:

Team Belgium forgot their ties, but maybe they headed to Ukraine by mistake; the tie was moved to Estonia.
Official diner in tallinn for @DavisCup ...ready for the tie...#hopefullywecangobackintotheworldgroup#gobel gium# pic.twitter.com/9JMXcbAv1T
— steve darcis (@stevedarcishark) September 10, 2014
Team Colombia is a little mismatched. But still all good.

Suit up and ready to go to @DavisCup dinner! Vestidos y listo para la cena de @CopaDavis pic.twitter.com/5zN5wExjU5
— Robert farah (@RobertFarah_) September 10, 2014
The Argentines can be forgiven the lack of ties. They're in South Florida to face the "home-team", Israel.
Looking good Argentina! / RT @charlyberlocq: Cena oficial con todo el equipo !!! @CopaDavis Argentina/Israel pic.twitter.com/1n7JREGUHb
— Davis Cup (@DavisCup) September 11, 2014
Team India is natty (the double-breasted jacket is a nice touch):
All suited up for the official dinner in Bengaluru last night, it's Davis Cup week. @DavisCup @SomdevD #TeamIndia. pic.twitter.com/GE0nWI0BCC
— Rohan Bopanna (@rohanbopanna) September 11, 2014
*
Team Spain looks good, although a lot of people (Rafa, Daveed, Fernando, Feli) are missing:
Foto de la selección española de tenis. El sorteo comienza en breve #BRAvESP pic.twitter.com/lPHE75lwUH
— Copa Davis (@CopaDavis) September 11, 2014