The Saints forward was superb against Newcastle on Sunday afternoon.
Indeed, as Newcastle lost 3-2 at Norwich City and the Saints were beaten at Leicester City, it was clear Ronald Koeman's men could do some damage against a far weaker side.
And so it proved. Southampton were rampant against the Magpies and shone in front of a delighted St Mary's crowd. A high Premier League finish is still possible for Koeman's team and a top-eight place looks the least the South Coast are guaranteed if they keep up their current form.
There was one worry for supporters on Saturday, however. Shane Long was immense against Newcastle but, when he went off, Southampton didn't look anywhere near the same side.
That has led many to heap further praise on the Irishman but question where the Saints would be without him - a surprise star considering so many questioned his initial valuation.
Here's how Southampton fans reacted on Twitter to Long's performance...
No coincidence that we played a lot worse after Long went off. #saintsfc— Sam Bishop (@BishhhhhyBoy) April 9, 2016
Anyone else see Shane Long throwing up on the pitch?? He gave everything today as always!! #saintsfc— Voice of St Marys (@voiceofsms) April 9, 2016
Some eyebrows were raised by the £12mil we paid for Long but without him in the side we don't look half as dangerous #saintsfc— Stuart Dare (@StuartDare21) April 9, 2016
today's game shows how important shane long is to our team. we definitely lack a spark when he's not playing #saintsfc— Karl (@ObscureThing77) April 9, 2016
Shane Long has been our best attacker this season. We just look more dangerous with him in the team. Never thought I'd say that. #saintsfc— Matt. (@MattB91) April 9, 2016