2018 Connecticut Open
The 2018 Connecticut Open was a tennis tournament played on outdoor hard courts. It was the 50th edition of the Connecticut Open, and part of the Premier Series of the 2018 WTA Tour. It took place at the Cullman-Heyman Tennis Center in New Haven, Connecticut, United States, from August 19 through August 25. It was the last event of the 2018 US Open Series before the 2018 US Open.
Prize money
| Event | W | F | SF | QF | Round of 16 | Round of 321 | Q3 | Q2 | Q1 |
| Singles | $132,740 | $70,880 | $37,850 | $20,350 | $10,915 | $6,925 | $3,110 | $1,650 | $920 |
| Doubles* | $41,520 | $22,180 | $12,120 | $6,165 | $3,350 |
1Qualifiers prize money is also the Round of 32 prize money.
*per team
Singles main-draw entrants
Seeds
Other entrants
The following players received wildcards into the singles main draw:The following players received entry using protected rankings:
The following players received entry from the qualifying draw:
The following players received entry as lucky losers:
Withdrawals
;Before the tournament- Ashleigh Barty → replaced by Samantha Stosur
- Kiki Bertens → replaced by Pauline Parmentier
- Mihaela Buzărnescu → replaced by Irina-Camelia Begu
- Simona Halep → replaced by Belinda Bencic
- Daria Kasatkina → replaced by Maria Sakkari
Retirements
Doubles main-draw entrants
Seeds
- Rankings are as of 13 August 2018
Other entrants
The following pair received a wildcard into the doubles main draw:The following pairs received entry as alternates:
Withdrawals
;Before the tournamentRetirements
Finals
Singles
- Aryna Sabalenka defeated Carla Suárez Navarro, 6–1, 6–4
Doubles
- Andrea Sestini Hlaváčková / Barbora Strýcová defeated Hsieh Su-wei / Laura Siegemund, 6–4, 6–7,