Lothar Matthäus has urged Bayern Munich to try and sign Florian Wirtz and renew the contract of Jamal Musiala to have the two “superstars of the future” together for club and country. Former Bayern and Germany captain Matthäus said in a column in Wednesday’s edition of the Sport Bild weekly that the Bundesliga and the national team would benefit from this. “Bayern, the German club with the greatest appeal and financial strength, must now really do everything it can to extend Musiala’s contract, which we all know is what the Bavarians want,” Matthäus said. “To do this, they have to get Wirtz fr…