Denis Shapovalov booed in one of many retirements in Basel, Grigor Dimitrov returns for first time since July and the inaugural Next Gen class lookback

In our Daily Dose of Social Media, we look back at some of the moments you may have missed in the 24 hours. From entertainment to moments on and off court.

Among them include Denis Shapovalov bizarrely retiring becoming one of many in Basel, Marta Kostyuk in Sri Lanka, Grigor Dimitrov's return and Carlos Alcaraz arriving at the Paris Masters.

Denis Shapovalov became one of many to retire during a bizarre day in Basel and was booed as he gave up against Joao Fonseca. He made surprise unforced errors after a pretty good two sets and he looked disinterested. He handed Fonseca a 4-1 lead and the Brazilian loudly celebrating.

Only for Shapovalov to retire from the match soon after. Boos and whistles rung out as he walked off the court. Whether he had a genuine injury remains to be seen.

The Paris Masters was a welcome sight today as Grigor Dimitrov who famously returned to prominence at this event returned for the first time since Wimbledon.

He suffered a pectoral injury when it seemed like he was going to beat Jannik Sinner who went on to win the title but he seemed in high spirits as he returns to action for the first time since then. Can't put a man down for long.

“Sometimes the heart wants to keep going… but the universe has a different plan for us,” wrote Dimitrov in a post on Instagram, which included a photo of himself in a hospital bed. “Having to withdraw from this match at Wimbledon was one of the most painful moments of my career.

“Thank you for the overwhelming wave of love — from family, friends, fans, colleagues, to the entire tennis community… your messages have genuinely lifted me through these hard times. Thank you all. Truly. Recovery starts now. I’ll see you all soon. G.”

Marta Kostyuk has been in a reflective mood as of late albeit amid a media storm which the publication have said was taken out of context about Sabalenka and Swiatek being bigger than her.

Kostyuk did an interview with Tennis365 talking about how some players are at a disadvantage and Tennis365 issued a clarification saying that it was taken widely out of context.

But while that may or may not be the case, Kostyuk is enjoying some down time away from the storm as she explores Sri Lanka during her few weeks off from tennis life. Tennis stars get very little time off especially given the early start to the new year so Kostyuk and co will take as much time as they can get.

The Next Gen Finals will be coming up again soon and their Instagram account shared a pretty intriguing photo of the players from back then, a few haven't been heard from for quite some time.

Among those involved included Denis Shapovalov, Andrey Rublev, Karen Khachanov, Borna Coric and Daniil Medvedev. Many of whom have become pretty regular features on the ATP Tour and in some cases World No.1's and major winners.

But a few are very much lost in the annuls of time. Among them were Hyeon Chung who has tried and failed to make multiple comebacks after his previous heroics. While Jared Donaldson and Gianluigi Quinzi have hung up their racquet entirely.

Quinzi retired in around 2022 and is now a coach in an Academy in Italy. He only ever reached World No.142 and played 5 games on the tour overall so never fulfilled early potential. He beat Chung to win the Junior Boys Wimbledon title albeit way before in 2013.

While Jared Donaldson who was ranked in the top 50 as of 2018 but retired in 2021 having his last match only a year after his major rise. He reached the third round at Wimbledon in 2017 and US Open in 2016 winning a title on the Challenger Tour and is still only 29.

He has also become a coach so in reality while there were many success stories from the inaugural class, the same can be said for those who drifted away.

It was three retirements in one day in Basel as Denis Shapovalov decided to retired 3-6, 6-3, 4-1 down to Fonseca in their tie. This after Felix Auger-Aliassime put his ATP Finals hopes in serious jeopardy as he retired with a back issue against Jaume Munar.

But that wasn't it as Alejandro Davidovich Fokina received a retirement win as Casper Ruud bowed out after a 7-1 loss in the tie-break.

Very much something in the air in Basel this week and means that only Ugo Humbert facing Reilly Opelka actually completed his match. Pretty poor end to the year for some of these people.

Jannik Sinner took down Alexander Bublik to make it 19 matches won in a row won on indoor hard courts but while the Italian is excelling right now, he is only human.

Sinner missed a return at the net and was just left laughing at it instead of lamenting his bad luck and afterwards he lauded Bublik as he sealed the victory to move onto the semi-finals in Vienna.

Still alive he will then head to the Paris Masters next week with his main rival Carlos Alcaraz already there ready to go.

“Tough matchup. Playing QF in a 500 against Sasha is very difficult. I’m very happy. Tried to return as many balls as possible. I felt like he was serving great. I had some chances early in the first set. Couldn’t use them. Tried to stay there mentally. I’m very happy about that and happy to be in the semis again. Very dangerous player. I tried to stay as solid as possible," said Sinner post match.

He also discussed his change of serve. “Practice of course. Being also quite brave at times. Trying to understand, with less pace.. but trying to change it up. Here today I was serving really well. It’s for sure a shot where I don’t feel as comfortable and as safe yet. But I feel like every day is changing a little bit. Today.. Great percentage. I’m very happy. We try to keep going and keep pushing. Next match will be even more difficult. Alex is playing some great tennis. It was very close in Beijing. It’s gonna be a very tough and physical match. Let’s see what’s coming.”

Carlos Alcaraz has arrived at the Paris Masters ahead of an important few weeks. He opens his Paris campaign against Cameron Norrie or Sebastian Baez

It is also a new era for the tournament which will take place at the La Defense Arena in the Paris suburb of Nanterre after moving from the Accor Arena where it was held for yars.

The Spaniard practiced with Karen Khachanov today before his tournament starts early next week.