NINGBO (China), Oct 25 — World number one Elena Rybakina won her fourth title of an outstanding season with a ruthless straight-sets victory over Leylah Fernandez in the Ningbo Open final on Sunday.

The top seed and defending champion cruised to a 6-2, 6-2 win over the world number 30 from Canada.

Rybakina, the Australian and US Open champion, collected her 15th WTA crown in all and went a long way towards securing the year-end number-one ranking.

Rybakina broke and then held her own serve with a delicious two-handed crosscourt backhand for a 4-2 lead in the opening set.