The Czech defender made the short journey across West London in July, in what is the sixth loan move of his short career so far.
Despite joining Chelsea for £5m in 2010 from homeland club Sigma Olomuc, the 23-year-old has only four appearances under his belt for the Blues' first team so far, having made five previous loan moves across four different countries.
Short trip down Fulham Road
However, Jokanovic, who guided Watford to promotion in the 2014/15 season, insists that this time, Kalas is in the perfect environment to gain recognition from his parent club and their incoming boss, Antonio Conte.
“First of all Tomas has been very good at the beginning of the season,” Jokanovic said.
“He has done an important job for us and I believe this is a good place for him to get the benefits of playing more games as it is not his first loan," the Fulham boss added.
Jokanovic concluded, “Last season he didn’t play many games at Middlesbrough and generally we are so close to Stamford Bridge here, so they can check easily if Tomas is a player can help at Chelsea in the future or not.”
Wealth of first-team experience
Kalas, one of 38 Chelsea players shipped out on loan this summer, has started all five of Fulham's opening Championship fixtures so far this season, helping them to an early second place.
The centre-back is now a well-known name in England's second division, having made two separate loan moves to Middlesbrough over the last couple of seasons, playing a bit-part role in 'Boro's promotion in the last campaign.
Kalas made his Premier League debut for injury-stricken Chelsea in April 2014 under Jose Mourinho, starting in the crucial 2-0 victory over Liverpool at Anfield, having already made his Champions League introduction less than a month earlier.
The Czech international, who has made three appearances for his country, needs a strong campaign at Craven Cottage this season, if he is to force his way into Conte's plans next year.