Leipzig have built much of their recent identity around spotting young talent early and giving it a platform. Guiu fits that profile.
For Leipzig, the attraction is obvious. If they believe Guiu can grow into a leading No. 9, acting early matters. Waiting another year can turn a promising market opportunity into an expensive one.
The timing is notable because other reports say Nicolas Jackson has left Chelsea, which places more focus on the club’s centre-forward depth.
That does not automatically rule out any move for Guiu, but it does make the conversation more delicate.
Chelsea have shown a willingness to reshape their attack quickly, but that can cut both ways when a young player is still trying to establish himself.
For Guiu, this could come down to minutes. Young strikers need games, rhythm and patience from their club. Leipzig may be able to offer a cleaner development route than the one available at Stamford Bridge, where competition is rarely light and scrutiny is constant.
Nothing is settled yet, and the interest still appears to be at an early stage. But with the window moving and striker markets shifting fast, Leipzig, Chelsea and Guiu now have a storyline worth watching closely over the next few days.