Novak Djokovic does not know if his troublesome elbow injury will require another lay-off, but he reserved credit for Hyeon Chung following his Australian Open defeat to the brilliant youngster.
The six-time champion was beaten 7-6 (7-4) 7-5 7-6 (7-3) in the fourth round in Melbourne as Chung took full advantage of the ailing former world number one, who had returned to action at the tournament after six months out.
Djokovic, wearing a protective sleeve on his right arm, required treatment between the first and second sets, and revealed that he struggled beyond that point.
"Unfortunately, it's not great," he said of his injury. "At the end of the first set, it started hurting more so I had to deal with it until the end of the match.
"I played four matches here. It's a good tournament, of course, and it's disappointing to go out in the fourth round, but the circumstances are such and I have to accept it.
"It's frustrating when you have that much time and you don't heal properly, but it is what it is.
"I'm just trying my best because I love this sport. I enjoy training, I enjoy getting myself better and performing, competing. It was one of those days where it was too much to deal with.
Asked he requires another lay-off, Djokovic responded: "I really don't know. I have to reassess everything with my medical team and coaches.
"We have to scan it and see what the situation is like. In the last few weeks, I have played a lot of tennis."
Chung referred to the Serbian as his "idol" after sealing an unexpected victory, and Djokovic was glowing in his praise of his opponent's performance.
"It was an amazing performance," Djokovic said. "[Chung] was the better player on the court and he deserved to win, no question about it.
"Whenever he was in trouble, he came up with some unbelievable passing shots. From the back of the court, he was like a wall. It was impressive and I wish him all the best."
|CONCACAF Champions League Review: Guadalajara poised for quarters, Red Bulls draw|
|Del Potro stunned by Tiafoe at Delray Beach Open|
|Bouchard lawyer satisfied after jury rules against USTA|
|´Enough is enough, we gotta take action´ - Panthers´ Luongo on gun control|
|Former NBA pair help Brazil stay perfect in World Cup qualifying|
|Keane: Wilshere is the most over-rated player on the planet|
|Monfils wins rain-interrupted clash against top seed Cilic|
|Earnhardt says short-track speed skating is ´NASCAR on ice´|
|My knee flared up – Wawrinka reveals reason for retirement|
|Stoger: Dortmund were lucky to survive Atalanta scare|
|Gattuso hopes to continue as AC Milan boss|
|Europa League Review: Arsenal survive scare, Dortmund battle past Atalanta|
|Noren, Simpson share Honda Classic lead after Tiger shoots 70|
|´Complacent´ Arsenal had no ideas, Wenger admits|
|Wilshere pulls no punches after Arsenal´s Ostersunds defeat|
|Batshuayi accuses Atalanta fans of racism|
|Mercedes not responsible for spoiling F1 spectacle, Wolff claims|
|Veteran kicker Vinatieri signs with Colts for further year|
|More injury woe as Wawrinka retires from Open 13 Marseille|
|Villarreal defender Semedo charged with attempted murder|
|West Indies taking nothing for granted in World Cup qualifying|
|Police officer dies after clashes between Athletic Bilbao and Spartak Moscow fans|
|Atalanta 1 Borussia Dortmund 1 (3-4 agg): Returning Schmelzer strikes late|
|AC Milan 1 Ludogorets 0 (4-0 agg): Borini strike secures victory at San Siro|
|Arsenal 1 Ostersunds 2 (4-2 agg): Gunners through despite Emirates shock|
|Kerber back in the top 10 where she belongs, Schuttler proclaims|
|Simeone open to Carrasco, Torres exits amid CSL reports|
|Mancini: Zenit not Europa League contenders|
|Confident Kerber enjoying ´fresh start´ after downing Pliskova|
|Honda Classic grind ´like playing a British Open´, says Woods|
|Europa League Review: Napoli´s comeback in vain, Immobile sends Lazio through|
|Ferdinand has doubts over Kane´s Tottenham future|
|Zenit 3 Celtic 0 (3-1 agg): Ivanovic inspires second-leg turnaround|
|Atletico Madrid 1 Copenhagen 0 (5-1 agg): Gameiro ensures Simeone´s men cruise through|
|Six Nations 2018: Owen Farrell ´jumping out of his skin´ to face Scotland, Eddie Jones says|
|Why De Gea really is untouchable as the Premier League´s best goalkeeper|
|Woods, Thomas start strong at Honda Classic|
|Farrell ´jumping out of his skin´ to face Scotland, says Jones|
|I wouldn´t sell him - Arbeloa wants Bale to remain at Real Madrid|
|Two Grand Slams and 2,253 points scored - Gatland´s 100 Wales matches in Opta numbers|
|Leeds United delay reveal of new club crest|
|Guti urges Neymar to leave PSG for Real Madrid|
|Bottas: I can beat Hamilton to F1 title|
|Vettel and Ferrari ´fired up´ for 2018 after unveiling SF71H|
|Azpilicueta: Chelsea must be perfect to beat Barcelona|
|Rai´s big finish ensures three-way tie in Qatar|
|Roma star Under tipped to win Ballon d´Or before 2023|
|WATCH: Snedeker splashes around for a soggy six at Honda Classic|
|Hamilton says Vettel rivalry ´could be worse´ in 2018|
|Zola denies he will join Sarri at Chelsea next season|
|Barcelona is my club - Sergi Roberto rejects other interest to sign new deal|
|Lewandowski employs Zahavi as agent as Real Madrid rumours continue|
|If you gave me a chainsaw I´d take it off - Wolff not keen on halo|
|Farrell and Porter among five Ireland changes|
|Pardew confirms Evans remains West Brom captain|
|Muntari joins Seedorf at Deportivo La Coruna|
|F1 champs Mercedes launch new W09|
|Wigan coach Wane ponders Hardaker lifeline|
|Hamilton hopes for pre-season contract resolution|
|Winter Olympics 2018: Joy for Gisin, Hirscher´s woe and record-breaking win for Wu|
|Rooney: Moving to China for the money would have been easy|
|Carrasco left out of Atletico squad amid China move reports|
|Arthur: Move to Barcelona still on track|
|Blatter backs Morocco 2026 World Cup bid|
|Moeen backs Rashid, Hales white-ball decisions|
|Wenger sees Welbeck emerging from torrid struggles|
|Zidane stands by selfless Benzema|
|Sodhi earns New Zealand ODI recall|
|´Important names´ keen on Inter star Icardi|
|Hughes returns in only England change|