Last year during the Australian Open, Kvitova was recovering from surgery to her left hand as a result of a knife attack from an assailant who broke into her home in the Czech Republic in late December, 2016.
Stan Wawrinka struggled at times in his first match since last year's Wimbledon, but held on to beat Lithuania's Ricardas Berankis 6-3, 6-4, 2-6, 7-6 (2) in the first round of the Australian Open.
After losing the U.S. Open final to fellow American Sloane Stephens in September, Keys played just one more match before ending her season to let her wrist fully heal.
Former champion Angelique Kerber has won her 10th match in a row to start the season, beating fellow German Anna-Lena Friedsam 6-0, 6-4 in the first round at Melbourne Park.
Defending champion Roger Federer continues his quest for a 20th Grand Slam singles title and top-seeded Simona Halep starts another bid for her first when both see action on Day Two at the Australian Open.
- Overnight: Djokovic's dream comeback, Halep holds on, Konta cruisesEurosport.com AU
- After a bad day for the US at the Australian Open, remember to take the long viewThe Globe and Mail
- Major time in Melbourne: Australian Open starts MondaymySanAntonio.com
- Three burning questions for the women's AO drawNewburgh Gazette
- Form Simona Halep wary of first-round opponent Destanee AiavaNewburgh Gazette
- Women's title up for grabs at Australian OpenGkMen
- AO Day 2: The last time...Australian Open
- Former No. 1 Angelique Kerber ends drought by claiming Sydney Worldwide tilteKaplan Herald
- Even with out Serena, Aussie Open girls's discipline nonetheless robustKaplan Herald