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.
|Kerevi recommits to Wallabies, Reds|
|Lyon to ban fan for life after footage of Nazi salute emerges|
|Milan must respect opponents – Gattuso not underestimating Dudelange|
|Copa Libertadores Review: Zarate leads Boca, River draw|
|Mourinho: Dalot can play at Man United for more than 10 years|
|Johnson hoping to erase East Lake demons|
|´No question´ Fitzgerald faces Bears, says Cardinals´ Wilks|
|Rodgers says roughing the passer penalties are ´going the wrong direction´|
|Ravens fined $200,000 for violating communication policy|
|LeBron James set to star in ´Space Jam´ sequel|
|Ronaldo red card ´absurd´, says Pjanic|
|Kovac hails ´special´ Sanches after Bayern goal|
|Marcelino: Tearful Ronaldo said he did nothing wrong|
|Fernandinho takes blame for Man City´s Lyon loss|
|Lovren denies any wrongdoing after perjury charge|
|Plzen boss Vrba slams late mistakes|
|I almost scored as many as Messi - Tagliafico the unlikely hero for Ajax|
|Ronaldo deserves Ballon d´Or not Modric, says Casemiro|
|United fan Rafael - I´ve never lost at City|
|Davis explains abrupt mid-game NFL retirement: ´Football is not for me´|
|Lopes pays tribute to under-fire Lyon coach Genesio|
|Toulon´s Bastareaud handed five-week ban|
|Steelers WR Brown disciplined for missing meeting|
|Arteta refuses to make excuses for Manchester City´s Lyon loss|
|Allegri calls for VAR after Ronaldo´s contentious red card|
|Championship Review: Boro go second, Birmingham still winless|
|Lopetegui: Mariano took his chance|
|Juventus proved their quality after Ronaldo red card - Bonucci|
|Pogba ´class´ impresses Mourinho|
|Man City not Champions League favourites, insists Bernardo Silva|
|Isco calls for Modric to win Ballon d´Or after Champions League win|
|Wawrinka into last eight in St Petersburg|
|Goal hero Pogba is one of the best in the world - Shaw|
|Sane SOS can´t salvage sorry City display|
|Hoffenheim will learn lessons from Shakhtar draw, insists Nagelsmann|
|Valencia 0 Juventus 2: Pjanic hits the spot after Ronaldo sees red|
|Viktoria Plzen 2 CSKA Moscow 2: Krmencik heroics undone by late show|
|Benfica 0 Bayern Munich 2: Sanches returns to haunt his former club|
|Young Boys 0 Manchester United 3: Pogba double inspires Red Devils|
|Manchester City 1 Lyon 2: Cornet and Fekir stun Champions League favourites at home|
|Real Madrid 3 Roma 0: Isco stunner sets up winning start for Champions League holders|
|Ronaldo sent off on Champions League debut for Juve and may miss United reunion|
|Shakhtar Donetsk 2 Hoffenheim 2: Maycon denies Nagelsmann´s side|
|Ajax 3 AEK Athens 0: Tagliafico at the double in opening win|
|Dalot makes debut, Martial starts for Manchester United|
|India avenge ICC Champions Trophy loss with big win over Pakistan|
|Ronaldo makes Champions League debut for Juve|
|Lopetegui picks Navas over Courtois for Champions League clash with Roma|
|Willian very happy under Sarri after Conte row|
|Sarri deals blow to Chelsea kids´ Europa League hopes|
|Mendy out for Manchester City as Aguero makes bench|
|Cech accepts performances key to securing Arsenal stay|
|Monchi rules out Spain return amid Barcelona rumours|
|Durham skittled for 61 and 66 on the same day|
|Kane isn´t a machine – Lamela defends misfiring Spurs star|
|Hazard left out of Chelsea squad for PAOK trip|
|Tiger feels close to ending drought after achieving Tour Championship goal|
|Leno in line for Arsenal chance in Europa League|
|Gazidis leaves Arsenal in good shape, insists Emery|
|Eagles bring back WR Matthews, place Wallace on IR|
|England include Stokes, Hales and uncapped seamer Stone in ODI squad|
|Suwon Bluewings 0 Jeonbuk Motors 3 (aet, 4-2 on penalties): Quarter-final comeback ends in spot-kick|
|Australia captain Paine ready to slog it out with Pakistan|
|Nadal pulls out of China Open & Shanghai Masters with knee injury|
|Ostapenko begins Korea Open defence with victory|
|Joshua v Povetkin: How Olympic super heavyweight champions have fared|
|Liverpool ´made a point´ with PSG victory - Gomez|
|Osaka wows Tokyo crowd on WTA return|
|Excited Povetkin arrives in England for Joshua showdown|
|Kovac patience with Sanches set to reap rewards|