Full-time score from The Den
Jermaine Easter grabbed his third goal in as many pre-season games as Millwall saw off Spanish Segunda side Real Mallorca in a keenly contested Den encounter.
There were plenty of positives for manager Ian Holloway, who was able to give 24 players more crucial match minutes with the start of the new Championship campaign just eight days away.
The match also enabled a Den crowd of 3,817 an opportunity to take a first look at five of the club's six summer signings, with Matthew Briggs sitting out the game having penned a one-year contract just three hours before kick-off.
Millwall carved out a couple of early chances, first when Lee Martin's seventh-minute corner was headed wide by Alan Dunne.
Scott McDonald went even closer with 11 minutes on the clock, picking up the ball 25 yards out, easing past one challenge and then letting fly with a curling effort that flew narrowly over.
A couple of inviting deliveries across the face of the visitors' goal were begging for an outstretched boot to divert over the line as The Lions tried to find a way through.
Fuller's powerful header was held at the near post by keeper Jesus Cabrero before he arrowed a right-foot effort wide as Millwall continued to press.
A short free-kick was teed up by Nicky Bailey to Martin, who drilled over on 27 minutes befre the deadlock was finally broken just three minutes later.
Easter picked the ball up on the right and despatched a low shot that took a slight deflection on its way into the bottom left corner beyond the reach of Cabrero.
The goal was just reward for an enterprising display by Millwall's team in the first half, and it could so easily have been 2-0 after 37 minutes. Jimmy Abdou's sheer persistence saw the midfielder steal possession high up the field. He slipped the ball through to Martin, who in turn curled a fraction over from 18 yards.
Nicky Bailey hobbled off five minutes before half-time following another crunching tackle and was replaced by Jack Powell.
As expected manager Ollie fielded an entirely different XI after the break, but Richard Chaplow lasted just 15 minutes as he too, had his contribution cut short by injury. Jake Goodman came on at centre-half, enabling Shaun Williams to push further forward into a midfield position.
Chaplow had mustered the best chance of the half prior to his departure - a snap shot the flew wide of the target, but thereafter although The Lions enjoyed the majority of possession, there were few clear scoring opportunities.
Lee Gregory was a whisker away from marking his first game at The Den with a goal, latching onto a delightful forward pass from deep from Williams, only to send a rising shot over the bar with 15 minutes remaining.
Danny Shittu made a couple of important defensive blocks when Mallorca did get into dangerous positions, but it was Ollie's men who comfortably saw out the final few minutes to set themselves up nicely for the visit of Leeds United next Saturday.
Forde; Edwards, Webster, Dunne, Malone; Bailey (Powell, 40mins), Abdou; Martin, McDonald, Easter; Fuller.
Millwall second-half: Bywater; Siafa, Shittu, Williams, Beevers; Wright, Chaplow (Goodman, 59mins); Woolford, Gueye, O'Brien; Gregory.
Real Mallorca: Cabrero (Gomez, 46mins), Victor, Garcia, Bigas, Pereira (Cortes, 72mins), Bustos, Enriquez (Baleani, 54mins), Asensid, Prats (Izquie, 89mins), Company, Truyois.