你提到的是“踢球者”的报道：维尔纳拒绝今冬转会，将履行与RB莱比锡合同的最后半年。

Considering player contracts in Germany

In Germany, players can typically sign pre-contract agreements with foreign clubs, but the rules change when it comes to pre-contracts within the same association. Generally, it's not allowed to negotiate with other clubs domestically under specific domestic rules, which could vary. This requires caution, especially referencing sources like [[NEWS.CONTENT_HTML]]quot;Kicker.[[NEWS.CONTENT_HTML]]quot; I should check with the user about what they want me to do: translate, write a quick report, list potential next clubs, or make a data comparison.