Soldado moved to White Hart Lane from Valencia for £26m last summer, but he has failed to live up to his price-tag so far this season.
"We're all right for strikers here. If we added more players to what we've got, it would be impossible to train, too manic," Sherwood told reporters. "It's just a matter of time before Robbie hits the target again, starts scoring and gets on a run.
"He's a good trainer and he's just got to stick at it. We've all been professional footballers, so we know what it's like. What are you going to do? You have to keep training hard, working hard at it and it'll turn around because it always does.
"I'm sure it's not the first barren spell he's had. I'm not putting pressure on him and he's not putting pressure on himself."
Soldado has scored 10 goals in 24 appearances for Spurs so far this season.