If Robert Lewandowski thought his week couldn't get any worse, then we've got some news he may not want to hear.
The Bayern Munich striker and team-mate Kingsley Coman became embroiled in a training ground punch-up on Thursday.
The fight wasn't kept quiet and it's cast more doubt over his future.
But despite being the top scorer in the Bundesliga, the 21-goal striker won't enjoy reading Understat's findings.
The usually polished Polish finisher has the worst conversion rate in Europe's top leagues at -9.31.
Understat have carefully broken down each player's records in respect to the number of goals they have scored minus the goals they were expected to score.
Robert Lewandowski in training ground fight with Bayern Munich teammate Kingsley Coman
Manchester City's Gabriel Jesus came third with -4.92, with a slightly better ratio than Villarreal's Gerard Moreno.
Roma's Edin Džeko is fourth, with Lyon's Memphis Depay taking fifth spot.
The naughty list is less predictable than the good guys' role of honour.
Lionel Messi, who has 33 goals to his name at Barcelona in La Liga alone, tops the chart with an average of 9.37.
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Borussia Dortmund's Paco Alcácer is second, with AC Milan's impressive Krzysztof Piątek third.
Tragic former Nantes star Emiliano Sala is fourth with Tottenham Hotspur's Son Heung-min on 4.97 and is the highest ranking Premier League player.
Lewandowski's nightmare week at least ended without a fine.
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Bayern Munich boss Niko Kovac has confirmed the players won't be docked cash from their pay packets following their training ground flare-up.
"There was a fight between two players who were named in the media," Kovac said at his Friday press conference.
"The three of us discussed it after training, and both apologised for their behaviour and were sorry for what happened.
"No one is being fined because both players were understanding, and being understanding is very important now. The matter is done and dusted."
