Luca Nardi is congratulated by Novak Djokovic after Nardi’s upset victory at the BNP Paribas Open on Monday night. Luca Nardi used a combination of poise and power to stun his boyhood idol and top-seeded Novak Djokovic with a 6-4, 3-6, 6-3 win on Monday night in the third round of the BNP Paribas Open. “The mentality is the reason …