Bosnian international Begovic was offered the chance to replace usual first-choice keeper Courtois, failing to prevent the Blues falling to a 1-0 defeat.
It was his first league appearance since November, when the 28-year-old started 10 games in a row when Courtois was out injured.
With the Belgian star’s future at Stamford Bridge in doubt, due to comments made regarding a potential stay in West London, there is a feeling that Begovic could be the starting keeper next season.
He has certainly been showing what he needs in training to prove he has a future with Chelsea, and Hiddink has revealed that Begovic’s commitment is the reason he played against the Swans.
“Begovic is a good keeper and he has proven that,” the Dutch boss explained.
“He has done his job as a professional very well. He is 100 per cent committed in every training session and that is why I rewarded him with the chance to play.”
The Blues struggled to match recent performance levels in Wales, ending a run of 14 league games unbeaten by losing to a Gylfi Sigurdsson strike.
However, Hiddink refused to accept that the confirmation of Antonio Conte’s appointment as the next Chelsea manager played a role upon the result.
When asked if his players had been affected by the news that the Italian will be taking charge of the Blues in the summer, Hiddink replied: “I don’t think so.
“What we did in the second half was good. I don’t think they had it in mind to look to next season.”