Bearded and best
Marco Sailer is the undisputed owner of the Bundesliga's best beard - the SV Darmstadt 98 forward has helped his club to back-to-back promotions to reach the top flight.
FC Bayern München boss Pep Guardiola has been a huge hit in the dug-out since his arrival in the Bundesliga in 2013, with and without his beard.
Bayern have quite a tradition in the facial hair fashion stakes...the sight of the free-scoring Gerd Müller's beard must have made opposing defenders quake in the 1970s after he set the record for a single-season tally with 40 in the 1971/72 campaign.
Müller's nose for goal was much sharper than team-mate Paul Breitner's, but the latter arguably sported the smarter facial hair.
It's difficult to say who is more famous: two-time Super Bowl champion Brett Keisel of the Pittsburgh Steelers or 'Da Beard', which has its own Twitter account and Facebook page. Now retired, the former defensive end holds annual 'Shear the Beard' days for children's charities.
NHL players often grow a 'play-off beard' in the hope it will give them the boost they need to win the coveted Stanley Cup. Peter Forsberg wore a beard virtually throughout his career in north America, and lifted it twice with the Colorado Avalanche in 1996 and 2001.
Johnny Damon slugged his way to two World Series in a glittering baseball career with the Boston Red Sox and the New York Yankees. Though he last played in 2012, he has never officially retired. Perhaps he - and his beard - could yet make a comeback?
© gettyimages / Jim Rogash
Germany's most successful NBA export, Dirk Nowitzki's beard has never been quite as convincing as his on-court skills, which saw the Dallas Mavericks star named Finals MVP in 2011.
© gettyimages / Christian Petersen
The Houston Rockets' James Harden can match Nowitzki in the skills stakes, but comfortably outstrips him in the facial hair department.
The quintessential 'soccer' beard: Brazil lifted the trophy, but USA international Alexi Lalas stole the show at the 1994 FIFA World Cup.
A natural successor to Lalas in the beard stakes, Portland Timbers' Nat Borchers could match his illustrious predecessor by lifting the MLS Cup on Sunday.
After helping unheralded GFC Ajaccio into Ligue 1, captain Roderic Filippi and his beard have been keeping some of the French top-flight's best forwards at bay this season.