Arsenal have now signalled that they would be willing to pay €60m (£51m) to sign one of Europe’s most promising midfield talents. It’s certainly no secret Mikel Arteta wants to sign a new middle man this summer, someone who can complement Declan Rice’s arrival last. Surprisingly, Rice thrived in a more advanced role last season, an experiment that Arteta could make permanent next. Scoring seven goals, Rice enjoyed the best xG overperformance in the whole Arsenal squad last campaign, a remarkable feat. And that partly explains why Arsenal may decide to sign a new number six this summer, allowin…