By Tom Gott & Graeme Bailey Chelsea have agreed a deal to hire Christopher Vivell as their new technical director after he was released from his RB Leipzig contract, 90min can confirm. The Blues have held several rounds of talks with Vivell and, following his departure from the Bundesliga side on Friday, sources have confirmed that he is set to take up a similar role at Stamford Bridge. Co-owner Todd Boehly is an enormous fan of Red Bull’s multi-club model and is keen to bring something similar to Chelsea, and Vivell – who has experience with both Salzburg and Leipzig – is seen as the man to h…