Stan Wawrinka is aiming to compete at the Australian Open in January even if he is still short of full fitness.
The Swiss ended his 2017 season prematurely in August due to a knee injury, rendering him unable to defend his US Open crown and preventing him from competing in the ATP World Tour Finals.
A three-time grand slam singles champion, Wawrinka's first major success came at Melbourne Park in 2014.
And the 32-year-old is determined to feature at the tournament in January as he continues his rehabilitation.
"I had problems with this knee since the Basel tournament in 2016," he told L'Equipe.
"My only regret is not having stopped my grass [court] season earlier, which has only aggravated the situation.
"Today, I'm working with my physio six days out of seven. The goal is to play the Australian Open, even if I'm not 100 per cent."
Wawrinka split with coach Magnus Norman in October and the timing of the Swede's departure was a cause of significant frustration for the former world number three.
"It was a big disappointment, a shock," he said.
"In the most difficult moments of a career, one should be able to count on the closest ones."
|Inter must live on the edge to win, says jubilant Spalletti|
|Woods leads by three at Tour Championship|
|Bordeaux end Clermont´s perfect start, Zebo at double in Racing win|
|Lopetegui not worried about Courtois footwork|
|Joshua finds emphatic answer to Povetkin challenge|
|BREAKING NEWS: Brutal Joshua knocks out Povetkin in seventh round|
|Real Madrid can´t win 5-0 every week - Varane|
|Al Ahly 4 Horoya 0 (4-0 agg): Egyptian giants reach CAF Champions League semi-finals|
|Kings upset Warriors, Leinster batter Edinburgh|
|Son committed to Tottenham amid Bayern links|
|Simeone hails Atleti´s best LaLiga display of the season|
|Kovac: Bayern ´dominated´ Schalke in 2-0 win|
|Pochettino unimpressed with Tottenham´s tense finish|
|Campbell gains revenge as Price is halted by injury|
|Tottenham fatigue rumours are a myth, claims Rose|
|Widnes defiant after Super League relegation, Saints outclass Wolves|
|NFL must go back to college to eradicate the tie|
|Real Madrid 1 Espanyol 0: Asensio downs old club to earn narrow win|
|Sampdoria 0 Inter 1: Brozovic wins it late after VAR takes centre stage|
|Rudy takes blame for James goal in Bayern win|
|Tiger charges into four-shot lead|
|Players have given their lives to Burnley - Dyche|
|QPR 0 Norwich City 1: Pukki hits winner as hot streak continues|
|Nuno proud of Wolves character in Man United draw|
|Playing for England my dream, says in-form Maddison|
|Brighton and Hove Albion 1 Tottenham 2: Kane on target as Spurs issue firm response|
|Schalke 0 Bayern Munich 2: James and Lewandowski deliver another win|
|Getafe 0 Atletico Madrid 2: Lemar inspires routine win|
|Championship Review: Monk ruins Leeds´ unbeaten streak, McGinn screamer fails to save Villa|
|Bale benched for Real Madrid-Espanyol|
|Biggar fails to rescue Saints at Bath, Bristol and Wasps win|
|Zaha affected by back injury – Hodgson|
|Mourinho slams Manchester United attitude after Wolves stalemate|
|Herbert holds Portugal Masters advantage|
|Warnock blasts ´elementary´ Cardiff mistakes|
|Shaqiri substitution not easy for Klopp|
|Guardiola hopes for even more to come from Aguero|
|Fellaini accepts United closing gap to Premier League summit will be difficult|
|Klizan to face Thiem in St. Petersburg final, Bachinger shocks Nishikori|
|Klopp: Van Dijk injury not serious|
|Mourinho annoyed by Man Utd´s blunt attack in Wolves draw|
|Valverde not ready to consider Barca contract extension|
|Gattuso wary of wounded Atalanta as Higuain receives further advice|
|Burnley 4 Bournemouth 0: Rampant Clarets claim first Premier League win of the season|
|Crystal Palace 0 Newcastle United 0: Sakho misses sitter as Magpies remain winless|
|Cardiff City 0 Manchester City 5: Aguero celebrates new deal with goal in 300th game|
|Leicester City 3 Huddersfield Town 1: Comeback win eases pressure on Puel|
|Liverpool 3 Southampton 0: Salah ends goalless run as Reds make best Premier League start|
|Manchester United 1 Wolves 1: Moutinho stunner sees Red Devils falter at home again|
|Rashid, Hasan and Asghar fined by ICC|
|Barnsley game postponed after medical emergency|
|Johnny Manziel sacked five times in ugly CFL loss|
|Fosu-Mensah says sorry for tackle on Deeney|
|Kluivert to get Roma chance as Di Francesco demands focus|
|Robinson optimistic injured Cronk will be fit for Grand Final|
|WATCH: Ferguson given immense ovation on Old Trafford return|
|Three in a row for Lorenzo at Aragon|
|Warner makes 155 on Australian grade cricket return|
|Pain-free Kyrie Irving ready to lead Celtics to NBA title|
|Firmino returns as Shaqiri gets first league start|
|Fulham 1 Watford 1: Mitrovic shines late to spoil Gray´s day|
|Ronaldo vows to lose weight and assist training after Real Valladolid purchase|
|Patriots WR Josh Gordon listed as questionable to face Lions|
|500th goal was crucial to my new book - Ibrahimovic|
|Roosters survive Cronk injury to hold off Souths and reach Grand Final|
|Murray announces intention to end season early|
|I want to play right-back for England - Walker|
|I would beat Bolt for speed on the pitch, claims Traore|
|Ferguson returns to Old Trafford for Manchester United v Wolves|
|Walker ´hurt´ by Pochettino claims over Tottenham exit|