Just as the Magpies' injury crisis looked to be easing, both Schar and Joelinton were forced off in the first half of Saturday's match, with the former replaced by Emil Krafth in the 14th minute and the latter swapped for Lewis Miley on the 36-minute mark.
Seventeen-year-old Miley went on to score his first senior goal for Newcastle to break the deadlock just before the hour mark – becoming the Magpies' youngest Premier League goalscorer – before strikes from Miguel Almiron and Dan Burn sealed a much-needed victory for the hosts to end a three-game losing streak.
Howe has since confirmed that both Schar and Joelinton have sustained muscles injuries which could rule them out of next Tuesday's EFL Cup quarter-final clash with Chelsea, but the Newcastle boss hopes that they will not be on the sidelines for too long.
«Obviously, the injuries are the negative,» Howe said as quoted by the Northern Echo. «I think Fabian's is a glute problem – I don't think it's a hamstring – but Joey's possibly might be a hamstring.
»We don't think they're serious, but certainly to come off the pitch, they're short-term problems for us that we can't navigate easily at the moment.
«We were thinking that possibly we were through the worst of our injury situation. Now it's reared its head again in a negative way, so we'll have to see where we are.»
Both Schar and Joelinton are set to join Harvey Barnes (foot), Jacob Murphy (shoulder), Elliot Anderson (back), Matt Targett (hamstring) and Javi Manquillo (groin) in the treatment room.
Meanwhile, Alexander Isak was left
Read on sportsmole.co.uk