Everton duo Anton Peterlin and Cody Arnoux's trials at Motherwell have been extended until next week after impressing boss Craig Brown.
The Americans both featured in a practice game against Celtic on Tuesday and are expected to be watched again in another similar game next week.
Brown admitted the pair have done well in their trials and he could look to offer them permanent deals in the summer although he is aware Motherwell could face competition for them.
Brown said: "They are good players and they are here for another practice match next week.
"If they maintain the promise that we've seen, they must be candidates for signing offers, although, obviously, we may have to compete to get them."