The Netherlands took an early lead over Russia while the other three ties are all locked at one a piece after day one of World Group action.
The Dutch lead their away tie against Russia 2-0 after back-to-back wins. Meanwhile, Romania and Czech Republic, Germany and Switzerland as well as France and Italy are all tied 1-1.
Kiki Bertens provided the early breakthrough for the Dutch when she overcame world number 31 Ekaterina Makarova 6-3, 6-4 in just 73 minutes on the hard courts of the Olympic Stadium in Moscow, Russia.
However, the upset of the day belonged to Richel Hogenkamp, as she defeated two-time grand slam winner Svetlana Kuznetsova 7-6(4), 5-7, 10-8 in a four hour epic.
Hogenkamp saved a match point at 7-6 in the final set and went on to break Kuznetsova and serve out the win.
Karolina Pliskova beat Simona Halep 6-7(4), 6-4, 6-2 to earn the Czech Republic their first point, but Monica Niculescu got one back for Romania when she rolled over Petra Kvitova 6-3, 6-4.
Australian Open champion Angelique Kerber made easy work of Swiss Timea Bacsinszky to make up for German teammate Andrea Petkovic’s 6-3 6-4 loss to Belinda Bencic earlier in the day.
Finally, Italy’s Camilla Giorgi got the visitors off to a winning start against France’s Kristina Mladenovic, in Marseille, but Caroline Garcia eased past Sara Errani 6-3, 7-5 to tie things up.