Odds correct at time of postings - 0930 GMT 9/1/19
Serena Williams - 4/1
Angelique Kerber - 9/1
Naomi Osaka - 10/1
Simona Halep - 10/1
Aryna Sabalenka - 12/1
Elina Svitolina - 12/1
Odds correct at time of postings - 0930 GMT 9/1/19
While Konta and Watson disappointed, 2018 saw a host of young British women make leaps forward, none more significant than 22-year-old Boulter.
Tall with a big serve and forehand, Boulter, from Leicestershire, is hugely ambitious and made the breakthrough into the top 100 in October having started the season at 199. She won her first grand slam match at Wimbledon last summer and will make her slam debut outside of SW19.