Duryodhana considered that Karna and the Samshaptaka army were both able to kill that chastiser of foes Partha (Arjuna).
कर्ण संशप्तकांश्चैव पार्थस्यामित्रघातिनः॥ अमन्यत वधे युक्तान् समर्थांश्च सुयोधनः।