[5] In 2014, Louw was included in the South Africa Under-20 squad that participated in the 2014 IRB Junior World Championship held in New Zealand.

[8] He once again started their final pool match, a 21–8 victory over Samoa as South Africa finished top of the group to set up a rematch with New Zealand in the semi-finals.

Louw came on as a replacement in their semi-final to help South Africa secure their fourth consecutive victory over New Zealand at this level, winning 32–25.

[13] He was named in the wider training group of their Super Rugby side the Stormers,[14] and then included in their final squad for the season.

On the move, Louw said, “It is exciting to be going back to South Africa and to be reunited with the Vodacom Bulls, I had an unbelievable time at Harlequins with great memories and hopefully we can make some great memories in Pretoria too.” He has expressed hopes of helping bring a championship home to the Bulls: “My rugby career started at the Bulls and I think it’s every rugby player’s dream to win a few trophies in their career, so I am very keen to join the team and work with great players and coaches to make that dream our reality.”[19] Louw was called up to the Springboks for the 2017 Rugby Championship following Coenie Oosthuizen's broken arm.