Newcastle duo Kevin Nolan and Steve Harper will miss the last two games of the season through injury.
Magpies skipper Nolan requires an ankle operation, while goalkeeper Steve Harper is set to undergo knee surgery.
Nolan has been struggling with the ankle problem for most of the season and the club have now decided to send him under the knife to sort out the injury.
Tim Krul has been deputising for Harper in recent weeks and now the club have opted to send the long-serving keeper for surgery.
Newcastle are hopeful both players will be fit in time for the start of pre-season training in July.
A club statement read: "Kevin Nolan will undergo a minor operation on his right ankle later today which will see him miss United's last two games of the season.
"The skipper has been troubled by an ankle problem throughout the season, but the operation is going ahead now in order to allow him time to regain full fitness prior to the start of United's pre-season programme in July."