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."
|Manchester United to host Brighton in FA Cup quarter-finals|
|Leinster see off Scarlets as Munster come up short in Cardiff|
|New No.1 Federer earns gritty Seppi win to book Rotterdam final|
|Mata ´still up for VAR´ despite disallowed goal at Huddersfield|
|Valverde: Barcelona had to suffer at Eibar|
|Championship Review: Fulham end Villa run, Cardiff pounce|
|Resilient Kvitova ousts Wozniacki in Doha thriller|
|Huddersfield Town 0 Manchester United 2: Lukaku sends visitors through after VAR controversy|
|Toomua inspires Tigers win over Quins, Worcester beat Gloucester|
|Bayern Munich boss Heynckes hails game-changing Muller|
|Locadia benefiting from ´competitive´ Brighton - Hughton|
|Baby on board? Alba dedicates Barca goal to girlfriend|
|West Brom future ´not a decision for me´, says Pardew|
|Lions get De Bruin off to winning start|
|Paris Saint-Germain 5 Strasbourg 2: Cavani at the double in bounce-back win|
|Bar-celona! Messi posts unwanted record|
|Barca go 31 LaLiga games unbeaten to tie club record|
|Mourinho: I don´t know and I don´t care when Pogba returns|
|Brighton and Hove Albion 3 Coventry City 1: Locadia, Ulloa lead Seagulls to quarter-finals|
|EIbar 0 Barcelona 2: Suarez and Alba seal points as Orellana sees red|
|West Brom 1 Southampton 2: Rondon stunner in vain as Baggies drop out|
|Wolfsburg 1 Bayern Munich 2: Lewandowski spot-on after Robben´s penalty miss|
|I hope Cutrone finds a beautiful girlfriend so he can rest and make love - Gattuso|
|Wellens claims Ruta del Sol lead, Froome suffers puncture|
|Goffin forced to retire in Rotterdam following freak eye injury|
|Allegri denies Champions League ´obsession´ ahead of Turin derby|
|Barry, Evans start for West Brom after training camp incident|
|Bottas unaffected by ´Halo´ on simulation runs|
|Sheffield Wednesday 0 Swansea City 0: Carvalhal settles for replay on Hillsborough return|
|Management ´tiring´ but Zidane not ready to leave Madrid just yet|
|Thiago back for Bayern as Heynckes rests stars for Besiktas|
|Simeone urges Atletico fans to get behind Griezmann|
|Robben amazed by Guardiola´s impact at Manchester City|
|Three-way tie for lead in Oman as Pavon falls away|
|McIlroy frustrated by added scrutiny of playing with Woods|
|Morgan to take it slow with Stokes and backs Rashid|
|Pogba out of Man Utd´s Huddersfield trip with illness|
|A-League Review: Perth ´Panenka´ punished, 10-man Adelaide rescue late draw|
|Dragons and Rabbitohs see off Super League opponents|
|Robben targets two more years at the ´highest level´|
|Rashford and Herrera ´have a chance´ of making Sevilla trip|
|Mixed feelings for Tiger Woods after missed cut at Riviera|
|Emery defends PSG star Neymar after Madrid display|
|Nishikori stays hot in New York as Anderson awaits|
|Kevin Durant: Laura Ingraham´s ignorant comment was racist|
|Thiem sets up Monfils semi-final showdown|
|Mahrez saga now over, says Leicester boss Puel|
|Cantlay, McDowell and Saunders top at Riviera as Woods makes early exit|
|Tiger Woods misses cut at Genesis Open|
|Astros manager Hinch on Cole: He doesn´t need to be fixed|
|Alonso to return for Barca clash but Bakayoko set to miss first leg – Conte|
|Mourinho: Manchester United will sign a midfielder|
|Record-breaking Federer rises back to summit, Goffin to meet Dimitrov|
|Kobe Bryant says Lakers ´shouldn´t need´ to recruit free agents|
|Federer pokes fun at himself after becoming oldest world number one|
|Woods to play Honda Classic as comeback continues|
|Glasgow Warriors book finals berth as Zebre upset Connacht|
|Conte given selection headache ahead of Barcelona clash|
|Atkins at the double as Warrington see off Widnes|
|Giroud ´relieved´ to get first Chelsea goal|
|Sarries scrap for Sale success|
|Records tumble in Federer´s latest remarkable ascent to the top|
|Chelsea 4 Hull City 0: Giroud scores and Willian stars as Blues reach last eight|
|Leicester City 1 Sheffield United 0: Vardy header secures quarter-final spot|
|Agassi congratulates Federer after losing rankings record|
|Kvitova to face Wozniacki after Goerges pulls out|
|I cry often and I cry alone - Buffon benefits from his emotional side|
|This one means the most - emotional Federer revels in return to the top|
|Mason retirement ´heart-breaking´, says Cahill|
|After five years and three months, Roger Federer is back on top of the world|