Maria Sharapova said she is "not overly confident" in her pursuit of a sixth grand slam title after making a winning start at the Australian Open in Melbourne.
Former world number one Sharapova marked her first match in Australia since 2016 with a 6-1 6-4 victory over Tatjana Maria at Melbourne Park on Tuesday.
A 15-month doping ban after testing positive for meldonium – dating back to the 2016 Australian Open – forced the five-time major winner to skip last year's tournament.
However, it was business as usual for Sharapova on Margaret Court Arena as the Russian star saw off Maria to reach the second round.
Asked how confident she is of winning the Australian Open, Sharapova told reporters: "I think confidence comes with time and with match play and putting yourself in situations where you're able to take those opportunities.
"I know that nothing will be handed to me or anyone. You have to work for every point in a match. It's too far to tell. I'm not overly confident.
"I have expectations because of my previous results in my career, and I know at what level I can play and what tennis I can produce. But I'm also realistic, and the process of coming back takes time. I keep building and learning."
Sharapova was a class above in the opening set as she broke in the first game but Maria produced a spirited display in the second.
Maria, playing behind the baseline, found her rhythm, however, Sharapova claimed five of the final six games to cruise into the next round.
"It felt pretty routine," the 30-year-old said. "I have been here a week, practising on the courts. Got used to all the different weather conditions that Melbourne presents to all of us. It's been good.
"I felt like I have got a lot of things out of the way physically and emotionally and mentally last year with - there was a lot of firsts again for me, playing the first tournament, first grand slam, and just different feelings and what it would be routinely. But it felt pretty routine today, just really happy to be back here."
Sharapova continued: "I feel like I'm building. I feel like with every tournament and every week I have different feelings about different things. Some things are coming a little slower than I wanted. Some things I feel good about.
"Still feel like I'm building physically and getting the match play in. I'm motivated to, with every week, to keep taking in what I have learned from that week and using it to my advantage in the following tournament. As long as I have that in my mind, it's okay."
|BREAKING NEWS: Argentina rule Romero out of World Cup|
|Emery´s website appears to confirm Arsenal appointment|
|´Inspiring´ Guardiola has made Fleetwood a better golfer|
|Two trophies in a week! Torres leaves Atletico Madrid in style|
|I died a thousand deaths - Yates set for Giro defensive after time trial|
|Hamsik hints at Napoli exit amid China rumours|
|Rowett swaps Derby for Stoke|
|Thiem comfortable in victory as rain delays Wawrinka|
|Schmelzer gives up Borussia Dortmund captaincy|
|Top seed Stephens struggling at Nuremberg Cup|
|This is the wrong information - Vieira rejects Nice speculation|
|France rest Guirado, recall Thomas for New Zealand tour|
|Warriors´ Iguodala upgraded to questionable for game four|
|Simmons, Mitchell unanimous picks for NBA All-Rookie first team|
|AC Milan referred over alleged FFP breaches|
|F1 Raceweek: Ferrari and Red Bull target Monaco upturn|
|Horoya 2 Mamelodi Sundowns 2: Camara header denies visitors´ comeback|
|Du Plessis rescue mission takes Super Kings to IPL final|
|Seedorf to leave relegated Deportivo|
|Wenger turned down Real Madrid ´two or three times´|
|Kane dreams of lifting World Cup trophy as England captain|
|UEFA opens disciplinary proceedings against Liverpool & Roma|
|Yates stays on course for Giro title, Dennis wins time trial|
|Brighton sign Nigeria international Balogun|
|Ronaldo again pips LeBron and Messi as sport´s most famous star|
|Marcelo fears backlash if Madrid lose Champions League final|
|Messi joins Argentina´s World Cup training camp|
|FIFA finds no doping cases in Russia´s World Cup squad|
|Liverpool´s strikeforce reminds Ronaldo of Real Madrid|
|Hysaj staying at Napoli ´regardless of Sarri´s future´|
|Amir fully fit for Lord´s Test|
|A fast start to life - The Golden Knights and the expansion teams who excelled early|
|Molina gets two-year anti-doping ban for positive test after Joshua bout|
|Ramos: We´re a vintage Real Madrid team|
|Klopp key to controlling Liverpool emotions, says Alonso|
|Bjorn names Westwood, Harrington, Donald and McDowell as Europe vice-captains|
|Scarlets players left wounded by ´shocking´ Scotstoun pitch|
|Arsenal fined £20,000 for Leicester penalty protest|
|Storm offer Bellamy ´significant´ deal amid reported Broncos interest|
|Rashford writes moving tribute on anniversary of Manchester Arena attack|
|Heaton backs Kane´s captaincy credentials|
|Salah deserves Ballon d´Or if Liverpool win Champions League – Owen|
|Wasps flanker Willis out for up to a year|
|Real Madrid v Liverpool: Is the Champions League enough to save Zidane?|
|I was left out on reputation - Nainggolan angered by World Cup snub|
|Pellegrini targets Europe with West Ham|
|Lopetegui extends Spain contract|
|Edinburgh-bound Barclay´s Scarlets career over following Achilles surgery|
|Saints swoop for NRL star Naiqama|
|Zidane: Be careful when you criticise Ronaldo|
|It doesn´t get better - Stevens relishing best-of-three shootout for Celtics|
|Favre named new Dortmund boss|
|LeBron and Lue hail evergreen Kyle Korver|
|Kane named England captain for World Cup|
|Wright slams Arsenal over Emery: It´s like a sushi shop!|
|Pellegrini named new West Ham manager|
|Late drama and sustained Ronaldo magic - Real Madrid´s road to the Champions League final|
|Yankees´ home runs fuel win over Rangers|
|LeBron scores 44 points as Cavs level series against Celtics|
|Kaufusi re-signs with Melbourne Storm|
|LeBron James sets record for postseason field goals|
|Monchi: Alisson will only leave Roma if I come out of retirement!|
|No offers from Chelsea or Zenit, says Sarri´s agent|
|No Champions League pressure as PSG´s Tuchel calls for patience|
|Nationals´ Juan Soto hits homer in second career at-bat|
|Buffon to decide future in a week amid PSG speculation|
|Eli Apple embarrassed by 2017 antics, ready to move forward|
|Bills release Richie Incognito from reserve/retired list|
|Gentry and Pelicans want Cousins back in New Orleans|
|MLB extends Blue Jays closer Osuna´s administrative leave|