"The greatest goal and game of my career," the dreadlocked South African winger said of his strike in the 1-1 draw with Mexico at Johannesburg's Soccer City that marked the start of the month-long 64-game tournament.
His eighth goal for his country continued a run of spectacular finishes in national team colours over the last years, including bending free kicks which have become his speciality.
It contrasts with a disappointing club season for Tshabalala, whose bid for a World Cup squad place seemed to distract from his performances at the country's most popular club Kaizer Chiefs.
"I was very, very delighted scoring the first goal of the World Cup on home soil in front of thousands of our supporters.
"It was my 50th cap, it was the best present for me and I'm really happy," he told Reuters as South Africa's team enjoyed a day off on Saturday.
"Coming into the game I've been doing well but I feel I can still do better," said the 25-year-old, who will now hold out hopes of attracting attention from European clubs.
"It was always my dream to make it in football and to play for Chiefs. I'm glad I have achieved that. Now you can't believe how grateful I am to be able to play in the World Cup."
"It's very possible to qualify. We showed that with hard work and determination, we can score goals. Hopefully we'll be more relaxed in the next match."
