However, Smalling has experienced a great uprise in his form as United have defeated Chelsea, Liverpool and Manchester City already this year, as well pulling off another stand-out performance on Saturday evening as Tottenham Hotspur were beaten 2-1 in the FA Cup Semi-Finals.
Both Spurs and United were left angry by the joke at Kane's expense and sources said the striker, who could captain England at this summer's World Cup, was bemused and disappointed by the tweet, which came at the end of a hard week for the player and his club.
The tweet has since been deleted by the @EmiratesFACup account, which has over 171,000 followers.
"We have written to both clubs to apologise for any offence caused", an FA spokesperson told Press Association Sport.
But at Wembley in the Emirates FA Cup semi-final, it was his defensive game that was the eye-catcher.
Jones is all-but-certain of his place on the plane to Russian Federation but Smalling has played only twice under Southgate - who has omitted the 28-year-old from recent squads as he believes he has better options as ball-playing centre-backs.
NASA spots mysterious holes in Arctic Ocean ice cover
IceBridge mission scientist John Sonntag captured the images of those mysterious circular formations. Some think they are related to warmer water under the ice.
"That's people's opinion", he said.
'But when you set standards, people are going to look for things when you're not at them. I feel good, and I feel sharp. I'm the same. I want to be better, I want to do better. It's been a tough week, a tough week for the team.
Smalling has been the cornerstone of manager Jose Mourinho's defence in 2018, while goals against Crystal Palace, Manchester City and Bournemouth have added a new regular contribution to his armoury.
Smalling, meanwhile, said he enjoys coming up against a striker of the calibre of Kane.
"I love my battles against "H" (Kane)".
'I don't think he's scored too many against me so long may that continue.
- Stock inside Analysts Spotlight: Gilead Sciences, Inc. (GILD)
- Google parent Alphabet beats expectations, shares jump
- National School Walkout: Students march from Brown's Island to Va. State Capitol
- Canadian lynched in Peru over suspicion of killing indigenous traditional healer
- Kim's 'bitter sorrow' as N. Korea bus crash kills 32 Chinese tourists
- Flight records undercut Trump's claims to Comey about controversial 2013 Moscow trip
- Hyderabad cobbler run over by speeding vehicle
- President Trump Orders Immigrant 'Caravan' Stopped at Border
- Avoid all romaine lettuce from Yuma or of unknown origin — CDC
- Indiana Health Dept. Urges Hepatitis A Vaccine For Ky., Mich. Visitors