London Broncos coach Tony Rea paid tribute to Australian Jamie Soward following the 29-10 Tetley's Challenge Cup victory over Sheffield Eagles.
The stand-off, signed as a short-term replacement for Craig Gower, scored a superb solo try at the Don Valley Stadium as the Super League side booked their place in the semi-finals.
"He was important out there," Rea said. "His game control and kicking was good and he stamped his class with a typical Jamie try.
"He's fitted in really well with the guys. He's got a lot of energy and they get a lot of confidence from playing with him.
"We had a fantastic attitude and our effort meant we were always going to win us the day.
"I'm very happy for the whole club. There are a lot of people who do great work and it's a great moment for them."
Soward added: "It's massive for the club. We're disappointed league-wise but I made it my mission to come and do something special in this club and get to Wembley."
Sheffield, who were unbeaten since April 1, only trailed 10-4 at half-time but were punished for making too many handling errors.
"They're gutted because we know we're better than that," coach Mark Aston said. "We didn't give ourselves a chance to show what we're about.
"We made six mistakes in the first six plays and it told in the end. We were fatigued and made poor decisions because we did too much defending.
"But I'm immensely proud of all 17 players out there. Defensively we were very, very good, they put their bodies where they needed to do.
"At 10-4 at half-time, we still believed and probably the turning point was their try early in the second half when they scored from an offside position."