  We investigate the static $\overline{Q}Q$-potential for $N_f = 2+1$ QCD at
the physical point in the presence of a constant and uniform external magnetic
field. The potential is found to be anisotropic and steeper in the directions
transverse to the magnetic field than in the longitudinal one. In particular,
when compared to the standard case with zero background field, the string
tension increases (decreases) in the transverse (longitudinal) direction, while
the absolute value of the Coulomb coupling and the Sommer parameter show an
opposite behavior.
