"I had watched the Boks, just like any other supporter, and was thrilled how they bounced back after that sad defeat to Japan, and then when I was watching the England-Wales game later that evening my phone rang ...
"I was surprised to hear coach Heyneke [Meyer] on the other end of the line," Serfontein admitted. "He said Jean was injured and that he was considering picking me but he would only confirm it on Sunday.
"I couldn't sleep that night and got the news in the morning. It has been a bit crazy but I'm obviously thrilled to be here now and will do everything I can to contribute."
Serfontein has played 21 tests and will not be overawed if he suddenly finds himself in the starting line-up at 12. It could well happen because Damian de Allende has a knee ligament strain and while he could play at a push, he could well exacerbate the injury.
That could mean the Boks having Handre Pollard, the 2014 IRB Junior Player of the Year, next to Serfontein, the 2012 IRB Junior Player of the Year, and 20-year-old Jesse Kriel at 13.
Serfontein said he was devastated to miss out on initial selection.
"It has been a difficult season. I had a couple of injuries, which didn't help, at vital times in the season and Jesse did very well and got his chance. I can't complain. Life gives you a few curveballs, and you have to adapt. Look at what has happened to Jean in World Cups. And his bad luck has suddenly revived my career. That is rugby, that is life ...
"Only the best guys can be on the field and when you find it is not you out there, it makes you train harder to get into the team."
- Independent News, SA