2018 WTA Finals – Singles
| Singles | |
|---|---|
| 2018 WTA Finals | |
| 2017 Champion |  Caroline Wozniacki |
Caroline Wozniacki is the defending champion.
Simona Halep will retain the World No. 1 position, despite her withdrawal from the tournament.
Naomi Osaka, Sloane Stephens and Kiki Bertens will make their debuts in the event.
Seeds
Alternates
Draw
Key
- Q = Qualifier
- WC = Wild card
- LL = Lucky loser
- Alt = Alternate
- SE = Special exempt
- PR = Protected ranking
- ITF = ITF entry
- JE = Junior exempt
- w/o = Walkover
- r = Retired
- d = Defaulted
- SR = Special ranking
Finals
| Semifinals | Final | ||||||||||||
Red Group
 Kerber
|
 Osaka
|
 Stephens
|
 Bertens
|
RR W–L |
Set W–L |
Game W–L |
Standings | ||
| 1 | Angelique Kerber
|
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| 3 | Naomi Osaka
|
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| 5 | Sloane Stephens
|
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| 8 | Kiki Bertens
|
Standings are determined by: 1) Number of wins; 2) Number of matches; 3) In two-player ties, head-to-head records; 4) In three-player ties, (a) percentage of sets won (head-to-head records if two players remain tied), then (b) percentage of games won (head-to-head records if two players remain tied), then (c) WTA rankings
White Group
| Wozniacki
|
 Kvitová
|
 Svitolina
|
Plíšková
|
RR W–L |
Set W–L |
Game W–L |
Standings | ||
| 2 | Caroline Wozniacki
|
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| 4 | Petra Kvitová
|
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| 6 | Elina Svitolina
|
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| 7 | Karolína Plíšková
|
Standings are determined by: 1) Number of wins; 2) Number of matches; 3) In two-player ties, head-to-head records; 4) In three-player ties, (a) percentage of sets won (head-to-head records if two players remain tied), then (b) percentage of games won (head-to-head records if two players remain tied), then (c) WTA rankings