I do not ask for these only, but also for those who will believe in me through their word...
John 17:20

This statement seems to refute a strictly Calvinist interpretation of this passage. The people Yeshua prayed for here would be brought to belief through the testimony of the disciples, not through prior election of God.

Otherwise, there would be no point in praying "also for those". In Calvinist soteriology, the number of the elect is already set and cannot be changed by any amount of prayer or evangelism.