The Bees won 2-0 over Swansea City in Saturday’s playoff final, advancing to the playoffs after nine different disappointments in their careers.
Brentford suffered a defeat in the final hurdle last season but has come back strong this year and will now become the 50th different club to play in the Premier League.
Speaking after the match, Jansson explained how Bielsa played an important role in helping the West London team in their push with the lessons he taught the Brentford skipper.
“I saw something in Brentford. I’m so grateful to Marcelo Bielsa at Leeds because he gave me so much, he gave me so much knowledge, ”he told Sky Sports.
“I actually brought him here to Brentford and they were so willing to listen to me with my ideas that I borrowed from Bielsa.
“I thank him very much, for me he is one of the best coaches in the world. People think our relationship is not the best but it is, it is very good, I am so grateful to her. Thanks to Bielsa and Leeds. “
Jansson also explained how this season is different from 12 months ago, with the Sweden international receiving messages of support from Leeds fans.
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“I think the difference this year compared to last year, last year there were a lot of Leeds fans against me,” he added.
“This year so many Leeds fans have been with me and with Brentford, probably because they’re already here and want me to come and join them. I love Leeds, Brentford fans know that, and of course I love Brentford just as much.
“I am so proud, I am so happy and it means a lot to me. I could go home to Sweden now and retire because this is what I have dreamed of for so long since I moved to England. “