Two-time winner Vera Zvonareva continues her comeback at the $250,000 Pattaya Open this week after missing 18 months of competition with an upper respiratory illness and a right shoulder injury.
The Russian is one of four wild cards in the WTA event and she will be playing just her third tournament since Wimbledon 2012.
Earlier this month Zvonareva, who required surgery on her shoulder, lost opening round matches in Shenzhen and at the Australian Open.
Winner of the Pattaya Open in 2009 and 2010, she fell in the 2011 semi-finals to eventual champion Daniela Hantuchova and in 2012 to Sorana Cirstea in the quarter-finals.
Although the former world number two and Wimbledon and US Open runner-up faces a formidable task to clinch here third victory in Pattaya, it is a challenge she is looking forward to.
"Every time I've been injured before I've come back stronger, she said.
"The difference is I've never really been out for this long. I know how severe my injury was. It's going to be a challenge to come back - but I like challenges."
Zvonareva, 29, opens against Thai wild card Peangtarn Plipuech and then could face fellow Russian and number four seed Ekaterina Makarova, who faces a qualifier in the first round.
Germany's Sabine Lisicki is the top seed and will be bidding to go one step further than in 2013, when she fell to Maria Kirilenko in the final.
Lisicki faces Croatia's Donna Vekic in her opening match.
Former French and US Open winner Svetlana Kuznetsova is seeded two and will tackle China's Zhang Shuai to earn a possible second round clash with Thailand's Luksika Kumkhum, who produced one of the biggest upsets at the Australian Open by ousting world number six Petra Kvitova.
Two-time semi-finalist Sorana Cirstea of Romania is seeded three and will play Slovak Anna Schmiedlova.
Russia's Elena Vesnina is seeded five and will play American Vania King, while Spain's Garbine Muguruza is seeded six and will hope to continue her stunning start to the new season after she won Hobart as a qualifier and then defeated former number one Caroline Wozniacki in Melbourne.
She faces Japanese veteran Kimiko Date-Krumm, while American number seven seed Bethanie Mattek-Sands plays Czech Karolina Pliskova and eighth seed Peng Shuai of China faces Austrian Patricia Mayr-Achleitner.