# Naomi Osaka
In winning her first Grand Slam title at the US Open earlier this year, the 20-year old Japanese woman Naomi Osaka showed remarkable poise and composure. Her handling of herself in the controversial final was truly remarkable. Osaka has had two titles this year at Indian Wells and at US Open. Her service game conversion rate this year has been an astounding 77% - the best among all 8 contenders. With a free-flowing risk-taking approach, Osaka will look to cap off a terrific year with a win in Singapore.
# Caroline Wozniacki
The absence of a Grand Slam trophy in her trophy cabinet was the one sour point in Caroline Wozniacki's career. She silenced her critics by taking the 2018 Australian Open trophy and the Number 1 ranking in January this year. The defending champion here in Singapore, Wozniacki won the recently concluded China Open in Beijing without dropping a set. Her serve which was her weakpoint has now improved and she uses it effectively to adapt her game to the conditions. The low bounce of the Singapore courts compliments her game and it doesn't look unlikely at all that she would go on and defend her title here.
# Angelique Kerber
Since having a stellar 2016 season where she won 2 Grand Slam titles, the Olympic Silver Medal and the World Number 1 ranking, 2017 was a forgettable year for the left-handed German as she endured a torrid season with dip in form and results. Rising from the lows of 2017, Angelique Kerber has risen to Number 3 in the world rankings and captured her first Wimbledon title earlier this year where she beat Serena Williams in the final. Kerber who is widely considered to have one of the best defence in the women's game almost always makes her opponent play an extra ball. It is her ability to track down the most difficult of shots and come up with shots from tight angles that has troubled the game's best. She will be looking to add the WTA Finals trophy to her wins in Sydney and Wimbledon and will start off as one of the favorites.