Border thrashed Namibia by an innings and 119 runs to wrap up their CSA 3-Day Challenge match before lunch on Saturday.
After dismissing Namibia for 182 in their first innings, Border took control of the match with a great batting display, as they declared their first innings at 428/6.
Burton de Wett led the way with a double century, scoring 201 off 216 balls (16x4, 6x6), while Somila Seyibokwe added 98 runs (11x4).
The two added a third wicket partnership of 206 runs, scoring at nearly 5 runs an over.