Britain's Jamie Murray and Neal Skupski are into the semi-finals at the Sofia Open - an event they need to win to stand a chance of qualifying for next week's ATP Finals.
They beat Moldova's Radu Albot and New Zealand's Artem Sitak 6-4 6-2 in the Bulgarian capital on Wednesday.
The second seeds face Fabrice Martin and Hugo Nys for a place in the final.
The British pair need to overtake Jurgen Melzer and Edouard Roger-Vasselin, who occupy the eighth and final qualifying place for the ATP Finals, which start on Sunday.
If top seeds Melzer and Roger-Vasselin were also to reach the final in Sofia, Murray and Skupski would not be able to qualify.