Valentin Vacherot said he finds it easier to play against opponents he doesn't know well after beating his cousin Arthur Rinderknech for the second time in the space of three weeks at the Paris Masters.
Monaco's Vacherot overcame a slow start to claim a 6-7 (9-11) 6-3 6-4 victory and set up a third-round meeting with British number two Cameron Norrie.
The 26-year-old claimed a shock victory against Rinderknech in the final of the Shanghai Masters earlier this month, becoming the lowest ranked ATP Masters 1,000 champion since the series began in 1990 (world number 204).