Аннотация:MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the Swift GRB 210210A ( S. Laha et al., GCN 29444) errorbox 1609 sec after notice time and 1649 sec after trigger time at 2021-02-10 02:27:57 UT, with upper limit up to 16.5 mag. The observations began at zenith distance = 78 deg. The sun altitude is -20.7 deg. The galactic latitude b = 24 deg., longitude l = 38 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1544104 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_______________ ______|_____|_______|______|______ __ 1739 | MASTER-SAAO | P\textbackslash | 180 | 15.1 | 1939 | MASTER-SAAO | P\textbackslash | 180 | 16.5 | The observation and reduction will continue. The message may be cited.