Great Britain's women are one win away from a clean sweep of their five-match series against the United States after a 5-2 victory in San Diego on Saturday.
Britain now lead 4-0 after the latest success with the final match on Sunday.
Great Britain coach Danny Kerry, who was frustrated at the two goals conceded, said: "It was another strong team performance.
"We had a good first half and created lots of chances and put the US defence under pressure."
USA v GB SERIES
- USA 0-3 GB
(Danson 3): 11 December
- USA 2-3 GB
(Bartlett 2, Walsh): 13 December
- USA P-P GB
: 14 December
- USA 1-4 GB
(Danson 2, Long, Rogers): 15 December
- USA 2-5 GB
: (Unsworth, Richardson, Herbert, Macleod, Long): 17 December
- USA v GB
: 18 December
All the goals came in the second half, with Laura Unsworth scoring her first international goal from a penalty corner and Helen Richardson rounding off a team move to make it 2-0 before Kathleen Sharkey cut the deficit.
Rebecca Herbert restored the two-goal margin and Hannah Macleod soon added a fourth, still within the first 15 minutes of the half. Herbert set up Katie Long to net Britain's fifth before Caroline Nichols grabbed a late consolation goal after Unsworth was yellow-carded.
On Thursday, two goals from Alex Danson and one each from Katie Long and Chloe Rogers saw Britain come from a goal down to win 4-1.
Danny Kerry's side had already enjoyed 3-2 and 3-1 victories over the USA this week, with another match rained off.