Daniel Wishart has been told to prove he is worthy of remaining with Hayes & Yeading for the rest of the season.
The 21-year-old returned for a second spell at Kingfield in January on a month-long loan deal from Alfreton Town.
He scored 11 goals in 109 appearances for Hayes & Yeading during his first stint after coming through the ranks at the club as a teenager.
Wishart made his second home debut in Tuesday’s 2-0 defeat by Bath City and assistant boss Tristan Lewis says he needs to see more from the versatile forward.
“He’s got two weeks left,” Lewis said. “If he plays like he did tonight then no [we won’t be looking to extend it]. He’s got to do better than that.
“He doesn’t look fit. He hasn’t trained regularly and, like everybody else in that dressing room, Dan has got to find a bit of character.”
Wishart only swapped United for Skrill Premier outfit Alfreton in the summer after the two clubs agreed an undisclosed fee.