Since Friday it has been the most talked about chin in the world.
When Cristiano Ronaldo scored the opening goal against Portugal's Iberian rivals Spain, he wheeled away, executing his trademark 'siuuuu' celebration before frantically rubbing his chin with the ferocity of Aladdin hoping to entice the genie from the lamp.
Social media went into overdrive. Why did he do it? Did it have a hidden meaning? Was it a dig at Lionel Messi?
Barcelona's bearded captain Messi, of course, was the centrepiece of an advertising campaign before the World Cup which saw him posing with a goat. GOAT is an acronym for 'greatest of all time'.
He's also Ronaldo's arch-rival in the seemingly never-ending debate over who is the best player in the world.
Ronaldo took things up a notch in the intrigue stakes by sporting a goatee in Wednesday's clash with Morocco in Moscow.
The questions will start again and people will speculate and pontificate as though it matters and, of course, it does not. Not one iota.
2 - Cristiano Ronaldo has become the first Portugal player since José Torres in 1966 to score a goal with his right foot, left foot and head in a single World Cup tournament. Collection. #POR #MAR #PORMAR #Ronaldo #WorldCup pic.twitter.com/liZrUSyXmq— OptaJoe (@OptaJoe) June 20, 2018
The focus should not even be on their talent. That has also been discussed long and often.
What stands out most when you watch Ronaldo and Messi is their work-rate and their dedication to their craft even though, as one press box colleague sagely noted, they occupy opposite roles in their national teams.
With Argentina, Messi is asked to do everything. He is inspiration, creator and goalscorer. Even for one so magically gifted it is too much.
For Portugal, everything is done for Ronaldo. He simply adds the gloss, the finishing touches, the icing on the cake. Admittedly, this is a latter-day incarnation of Ronaldo; CR7 2.0. The previous version was the swashbuckling winger with the mesmerising feet who could tear teams apart singlehandedly.
Across both, he has now managed 85 goals for his country - his 85th coming in the fourth-minute at the Luzhniki Stadium, a brave header among the flying boots to give his team a fourth-minute lead.
It moved the Real Madrid man second on the all-time list of international goalscorers, ahead of Ferenc Puskas and behind Iran's Ali Daei.
It also proved enough to win a low-key encounter but even that was largely down to the 33-year-old's desire in his own box, frequently heading away Morocco set-pieces at the near post. Add in the link-up play and the frequent cajoling of team-mates and it all added up to another satisfying afternoon for Ronaldo.
Not that it was appreciated by everyone in Moscow, though. After lashing a wonderful chance high over the bar at the start of the second half, cries of "Messi, Messi" cascaded down from the stands.
Ronaldo could have the last laugh as he will likely lead his team into the round of 16 here in Russia while it remains uncertain that achievement will be matched by Messi following Argentina's opening-match draw with Iceland.
Time will tell.
As for the GOAT, the argument and, in particular, the goatee, it's best to ignore.
We'd be splitting hairs.
|Froome plays down Thomas battle for Sky supremacy|
|Carnoustie record counts for little at The Open, says Fleetwood|
|I don´t see it - Napoli chief De Laurentiis plays down talk of Callejon-Suso swap|
|One or two changes required at Chelsea, says Sarri|
|Monaco confirm Golovin approach|
|Let´s keep making noise! - Serena dedicates Wimbledon run to fellow mothers|
|Full list of Open tee times|
|Fakhar inspires another big Pakistan ODI win|
|Spieth ´annoyed´ by re-watch of 13th hole|
|Kaka claims Ronaldo arrival will boost all Italian clubs|
|Spieth vows to be more artist than tactician in Open defence|
|Conte thanks Chelsea players, staff and fans|
|Rodgers: I´d love to play with the Packers to 40|
|Sevilla insist N´Zonzi will cost €40m|
|Hugill shows mystic powers with accurate World Cup predictions|
|World Cup 2018: FARE ready for post-tournament challenges in Russia|
|Woods grouped with Matsuyama and Knox at Open|
|Matthaus questions idea of French dynasty|
|Chandimal, Sri Lanka coach and manager banned for two Tests and four ODIs|
|Sassuolo demand at least €30m for Berardi|
|French media revels in ´crazy´ triumph|
|Mafi released on bail after alleged assault|
|Bierhoff must go! Berthold calls for Germany changes|
|Joshua to fight Povetkin in September|
|World Cup 2018: Goal-laden final adds to staggering World Cup stats|
|Runners and Ryders: Molinari impresses again as stars prepare for The Open|
|Macron to greet France team after Champs Elysees parade|
|Casillas and Suarez critical of VAR after World Cup final|
|TMO protocol clearly not working, says SANZAAR|
|Americans seek joy of six at Carnoustie, Rose out to end wretched run - The Open in Opta facts|
|Ronaldo arrives in Turin for Juventus medical|
|Stone: I had no idea what my score was!|
|The Open: A look back at Van de Velde´s Carnoustie calamity|
|Rakitic proud of ´brother´ Modric´s Golden Ball award|
|Serena can surpass Court, but Graf was the real target - Krajicek|
|Ronaldo moved to remain motivated - Kaka|
|Silva confident on Everton transfer targets|
|Golden Boot winner Kane aims to break August hoodoo|
|NFL training camp 2018: Contract holdouts and where they stand|
|Guardiola took me to another level - Alaba|
|Madrid selling Ronaldo a ´historic error´ - Calderon|
|MLS Review: LAFC, Atlanta held at home|
|Stones will watch re-runs of England´s World Cup matches|
|Ferdinand challenges Mourinho to unleash Pogba at United|
|Mbappe: I´m staying at PSG|
|Former NHL goalie Ray Emery found dead|
|Pirates secure five-game sweep of Brewers with walk-off win|
|WATCH: LeBron receives standing ovation at Lakers´ summer league game|
|Tony Romo wins celebrity-filled American Century Championship|
|McGregor praises Putin after attending World Cup final|
|Open-bound Kim claims maiden title with eight-shot triumph|
|Eagles running back Sproles plans to retire after next season|
|World Cup winner Rami retires from international football|
|Wimbledon champion Djokovic did not expect grand slam glory so soon|
|Ibrahimovic praises Pogba after World Cup final display|
|Wimbledon diary: Avengers too late for an Infinity War as Djokovic triumphs|
|Deschamp-agne – France´s 2018 vintage interrupt news conference to drench coach|
|I may have to dust my boots off! - Pele threatened by Mbappe exploits|
|WATCH: Mendy and Pogba dab with president Macron after World Cup win|
|Woods embracing ´different´ Carnoustie challenge ahead of Open return|
|Argentina dismiss Sampaoli after chaotic World Cup|
|France celebrates World Cup triumph|
|Djokovic made ´improvised Wimbledon trophies´ as a boy|
|Stone goes agonisingly close to 59 as Pepperell & Dantorp also make Open|
|Outcast Benzema delights in France win|
|Final a triumph in itself given Croatia´s off-field turmoil|
|Anderson laments Wimbledon final nerves|
|Deschamps joins elite club, Mbappe second to Pele - the best stats from the World Cup final|
|Belgium´s Courtois wins World Cup Golden Glove|
|Collarbone fracture confirmed for ´devastated´ Porte|