O’Shea, who has been one of Albion’s stand-out players at the beginning of this season under Valerien Ismael, hobbled off in the Algarve a little over half an hour into the game after a clash for the ball with Liverpool forward Diogo Jota.
Ireland took the lead through O’Shea’s centre half counterpart John Egan on the stroke of half time, but Cristiano Ronaldo broke Irish hearts with a double at the very end of the World Cup qualifier.
Ronaldo might have been lucky to have still been on the pitch after he struck out at O’Shea, who sought to unsettle him before his first half penalty – something which worked, as the returning Manchester United forward had his spot-kick saved by teenage goalkeeper Gavin Bazunu.
O’Shea shared on Instagram: “Devastated to be ruled out of the two home games.
“So proud of the lads. I will be back stronger,” he wrote.
While Ireland are now preparing for their Aviva Stadium double header against Azerbaijan on Saturday and Serbia on Tuesday without O’Shea, Albion are sweating on the defender’s fitness themselves, as they wait on scan results to determine just how serious the blow is.
Baggies attacker Kyle Edwards replied to O’Shea’s post, saying: “Warrior.”
O’Shea has scored two goals, contributed towards two clean sheets and has been generally one of the most impressive and consistent performers in the Baggies’ run of 13 points from 15 games.
Albion are already planning for the coming weeks without Matt Clarke, who is set to be out until around October with a hamstring injury, so the potential loss of O’Shea is one that Ismael could most certainly do without.