Another step on the way to defending their title as New Zealand's Erin Routliffe and Canadian Gaby Dabrowski won their round of 16 doubles in straights sets.
It was the ninth consecutive victory at the US Open for the pair, but the 7-5 7-6(3) victory over Jaqueline Cristian (Romania) and Angelica Moratelli (Italy) was anything but straightforward.
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It was eventful match which included a short rain delay, a time violation on Angelica Moratelli's serve, a bee chasing Dabrowski, plenty of double faults a some good play mixed with a longer rain delay.
In the first set Routliffe and Dabrowski held their nerve after being down 4-5 thanks to several breaks of serve from each side. There was also the first rain delay at 4-4.
Eventually Dabrowski served out the set 7-5 in a game which also featured two double faults and an ace.
In the second set the sides were evenly matched and continued trading shots until 6-6 when the rain came down with a stronger presence. They were off the court for around 30 minutes, however when they returned Routliffe and Dabrowski were fired up and took the tiebreak 7-3.
The match took two hours 22 minutes and will be a pleasing win for the top seeds.
They will now face either 10th seeds Hao-Ching Chan (Tapei) and Russian Veronika Kudermetova or the team of Harriet Dart (Britain) and Diane Parry (France) for a place in the final.