Evolution of the surface rotation velocity (top panel), the stellar rotation rate normalised by the critical rotation rate (middle panel), and the stellar angular momentum (bottom panel) as a function of system age, as computed with TREMOR. Two initial stellar rotation rates are considered: Ω_rot/Ω_crit = 0.2 and 0.3. The initial eccentricity was set to 0.1, and the initial orbital period is 3.14 days. The black track corresponds to the evolution predicted by single-star models.