After winning the biggest title of her career at the BNP Paribas WTA Finals Singapore presented by SC Global, Elina Svitolina is back in the Top 5.

The Ukranian entered the week at World No.7, but after going a perfect 5-0 across round robin and knockout play last week, she moves up three spots to World No.4 in this week's rankings.

Read more: Svitolina - 'I have nothing to prove to anyone' after WTA Finals triumph

Svitolina reached a career-high ranking of World No.3 last September, and her triumph in Singapore nearly returns her to that mark.

She now sits just over 200 points behind current World No.3 Caroline Wozniacki.

Her move back into the Top 5 ensures Svitolina a bit of personal history: her year-end ranking has never gone down in each of the past five years.

2010: 503
2011: 232
2012: 112
2013: 45
2014: 28
2015: 19
2016: 14
2017: 6
2018: 4

Elsewhere in the rankings, year-end action on the ITF Circuit also resulted in notable gains.

Former World No.51 Viktorija Golubic of Switzerland returns to the Top 100 after breifly falling out in October following a victory at the $80,000 event in Poitiers, France. 

She rises 16 spots to World No.91, while runner-up, 21-year-old Russian Natalia Vikhlyantseva, continues her climb back towards the Top 100 with a bump of 18 places to World No.134. 

Stateside, former World No.19 Varvara Lepchenko did not drop a set en route to lifting the trophy at the ITF $80,000 in Macon, Georgia, to rise 32 spots to World No.130, while rising 18-year-old Canadian Bianca Andreescu enjoys a move up of 58 places to World No.180 after reaching the semifinals on home soil at the $60,000 event in Saguenay, Canada. 

In doubles, Czechs Katerina Siniakova and Barbora Krejcikova became the sixth team to hold the year-end top spot in the doubles rankings in tandem. 

Read more: Krejcikova and Siniakova secure 2018 WTA Year-End World No.1 Doubles ranking

The pair sits just 10 points over World No.3 tandem, and WTA Finals champions, Kristina Mladenovic and Timea Babos - who will have to defend an Australian Open title together to begin 2019.