Another player starred in Dortmund's return to Bundesliga action on Saturday as Sancho was left on the bench
And for most Chelsea fans that would have meant taking another look at Jadon Sancho.
Sancho has long been a target for the Blues in the summer transfer window, although they will face stiff competition from the likes of Manchester United for his signature.
That is, if either side can stump up the £100million-plus that Borussia Dortmund will demand for their star forward.
Sancho has shone in his two seasons in the Dortmund first team and having just turned 20 has the world at his feet.
The Portuguese ace played a starring role in Dortmund's 4-0 demolition of their close rivals Schalke, scoring twice, once after Markus Schubert had made a hash of a clearance and he was played in, before scoring the third goal with a smart finish following a lovely team move.
And while the Chelsea supporters are not throwing the towel in over a move for Sancho just yet - he came on for the final 12 minutes - Guerreiro could satisfy some supporters' transfer wishes.
I wanted Guerreiro at Chelsea a few years ago before his injury issues, class goals
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Great, great finish from Guerreiro. He’s turning into a regular goal threat this year.
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Guerreiro has previously been linked with a move to Liverpool in the Premier League.
He is valued at £25.2million by Transfermarkt and has a contract at the Westfalonstadion until 2023
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