Louw made his test début at the New Wanderers Ground in
Johannesburg against a South American team on 26 April 1980. Captained by
Morné du Plessis, the South Africans beat their opponents by 24–9 before a crowd of 34,000. Appropriately enough, he finished his test career just over four years later with a match on 27 October 1984 against South America and Spain at Cape Town. The increasing pressure from internal and international opposition to apartheid had rung the death knell for international competition by South Africa's sports teams. Louw had played in 28 Springbok matches, of which 19 were tests; the most notable were probably the 1980 series in South Africa against the British and Irish Lions, and the 1981 tour to New Zealand and the USA. In the second test match at the
Free State Stadium in
Bloemfontein on 14 June, Louw scored in the 12th minute of the game.
Wing Gerrie Germishuys had intercepted a cross-field kick by the Lions'
Andy Irvine and sprinted down the left-side of the field, wrong-footing a retreating John Carleton with an outside-inside swerve. Germishuys passed to Louw, who gave the ball to
Willie du Plessis upon being tackled himself. Louw jumped up and ran himself into position on Du Plessis' inside to take his second pass. The cross-cover defense of
Ray Gravell arrived too late to stop Louw's try in the corner. Before the match
The Glasgow Herald had noted the pace of Louw, matched with that of Du Plessis, gave the Springboks "a marked superiority".
New Zealand tour, 1981 The Springbok tour to New Zealand met a barrage of protests against the policy of
apartheid. Protesters opposed the tour as part of an international anti-apartheid movement that believed in denying economic, sporting and cultural contact with South Africa. The movement wanted to isolate the South African government and force it to negotiate with the liberation movements, particularly the African National Congress. On the tour, Louw shared a room with coloured flyhalf
Errol Tobias. In an interview reported in
The Sydney Morning Herald, Louw claimed that black and coloured players were proud of the Springboks and that rugby had created a sense of unity among South Africans. Due to his friendship with Tobias, Louw was not well-regarded by team manager
Johan Claassen and coach
Nelie Smith. Reflecting on the tour 15 years later, former Springbok flank
Boland Coetzee praised Louw and
Hempies du Toit for their efforts to make Tobias feel welcome. The All Black visit to South Africa in 1985 was cancelled due to political pressure from anti-apartheid organizations. Trials had already been held to select a national squad. To compensate South African players for the cancellation, the South African Rugby Board selected a so-called "Shadow" Springbok team for an internal tour. The team included Louw and two players of colour, Dolly Ntaka from the black
South African Rugby Association, and Wilfred Cupido from the coloured Western Province Leagues.
International caps == Playing abroad ==