The 2020 Open Blot Rennes was a professional tennis tournament played on hard courts. It was the fourteenth edition of the tournament and part of the 2020 ATP Challenger Tour. It took place in Rennes, France between 20 and 26 January 2020.

Singles main-draw entrants

Seeds

CountryPlayerRank1Seed
UKRSergiy Stakhovsky1521
GEROscar Otte1632
SRBDanilo Petrović1663
SVKLukáš Lacko1784
FRAMaxime Janvier2015
RUSAlexey Vatutin2076
ESPBernabé Zapata Miralles2107
FRATristan Lamasine2148
GERMats Moraing2219
FRAConstant Lestienne22410
FRAAlexandre Müller22611
ESPRoberto Ortega Olmedo23812
GERTobias Kamke24513
RUSPavel Kotov24714
TURCem İlkel26415
AUTLucas Miedler27616
  • 1 Rankings are as of 13 January 2020.

Other entrants

The following players received wildcards into the singles main draw:

The following players received entry into the singles main draw as alternates:

The following players received entry from the qualifying draw:

Champions

Singles

Doubles