It is very well known to both Vasudeva and Arjuna that it is certain that in a fight with the mace there is none equal to Duryodhana.
स चाप्येतद् विजानाति वासुदेवार्जुनौ तथा। दुर्योधनसमो नास्ति गदायामिति निश्चयः॥