Fabianski, who now plays for West Ham, joined Swansea from Arsenal on a free transfer in 2014, signing a four-year deal.
After the Polish goalkeeper impressed in his first season at Swansea, Spielerrat, an agency that had worked with Fabianski for some time, looked to make money from the situation, as reported by Der Spiegel.
Fabianski was earning £35,000 per week but Spielerrat reportedly demanded for his wages to be increased to £50,000 per week.
As part of the deal, Fabianski would sign a one-year contract extension until 2019, which would result in an agency fee of £760,000 for the first season and £480,000 for each of the ensuing three seasons. As a consequence, the agency stood to make a total of £2.2million.
Spielerrat, headed by Daniel Delonga, Thorsten Wirth and Hannes Winzer, reportedly decided to exert pressure on Swansea so that the contract extension would go ahead.On May 28, 2015, Wirth formulated an e-mail on behalf of Boldt that claimed, falsely, that Leverkusen were interested in signing Fabianski in the event that Bernd Leno would leave.
Wirth eventually forwarded the e-mail to Swansea chairman Huw Jenkins and the club responded to the pressure by extending Fabianski's contract. It was announced recently that Boldt will be leaving Leverkusen this summer.
When contacted for comment by Der Spiegel, Bayer Leverkusen managing director of sport Rudi Voller said that 'a number of goalkeepers were being considered as possible candidates to replace Bernd Leno' in May 2015.
In addition, a lawyer for the agents from Spielerrat issued a statement on their behalf saying they would not tolerate 'false or speculative reporting.'