Sheffield saw their tough run of form continue as they suffered defeat against Edinburgh at Armadale.
The Tigers travelled to Scotland without star trio Simon Stead, Dimitri Berge and Jason Garrity due to injuries.
Despite being pitted against a patched-up Monarchs side also tracking three guests, they were unable to land a blow and could not claim a consolation point.
Guesting duo Ricky Wells and Richie Worrall put in creditable performances, as did middle order man Kyle Howarth.
Worrall delivered Sheffield their first race win in heat three before ex-Tigers man Wells took the chequered flag in heat five.
However, his victory was sandwiched by two devastating 5-1s from the fast-starting home side to ensure they seized the upper hand.
Worrall attempted to kick-start a potential comeback with a tactical ride in heat seven but was unable to overhaul former Sheffield mascot Max Clegg in a tight battle.
Howarth raced to a composed heat nine victory, whilst Josh Bates recovered from a tough start to partner Worrall for their only 5-1 in heat 10.
Yet it was not enough to prevent them from leaving empty handed on a night where they were well-beaten by a Monarchs side much sharper from the gate.
Bates endured another tough night, and with reserve duo Arthur Sissis and Nathan Greaves making minimal impact they ran 12 last places.
With young Edinburgh lower order pairing Max Clegg and Dan Bewley playing key roles, they outscored their Tigers counterparts 22-2 to give their side the edge.
The result leaves Sheffield winless in their last four meetings, and they will aim to bounce back when they host in-form Ipswich at Owlerton on Thursday (7.30).