Pieczonka reaches Zug Challenger quarter-finals — Polish derby awaits

Filip Pieczonka has advanced to the quarter-finals of the doubles draw at the ATP Challenger in Zug, Switzerland. He will face fellow Pole Szymon Walkow among his opponents in the last eight. Pieczonka and partner Joshua Paris had a tough first-round match against Max Alcalá Gurri and Raul Brancaccio before coming through.