Diaz and fellow player Darwin Nunez were absent from a recent preseason friendly match against AC Milan in Hong Kong.
After the match, Slot explained that Diaz was training well but had not been included in the lineup. He stated that he usually communicates regularly with his players, but in this case, he chose not to comment further on Diaz's absence.
Slot's comments suggest that Diaz's exclusion was partly due to the ongoing speculation about his future.
German club Bayern Munich has reportedly made a new offer for Diaz, valued higher than their previous bid of €67.5 million.
Negotiations between Liverpool and Bayern Munich are ongoing, and it is expected that Diaz will sign a contract with Bayern until at least 2029.
This development comes after Barcelona had previously withdrawn from the race to sign Diaz.