Jol's decision to throw his new £10.6million striker in at the deep end backfired on Sunday, with Ruiz hauled off at half-time after failing to cope with the pace of the English game. And Cottagers boss Jol has held his hands up, acknowledging he should have given Ruiz a more gentle introduction by starting Mousa Dembele and bringing the new man off the bench. Jol said: "In hindsight, I would have started Mousa and then brought him on because he's good when there's a lot of pressure on the goal, space in the box, and Bryan Ruiz probably would have given us a lot second half." Jol added: "It's always difficult - if you come to the Premier League - your first game. I wouldn't say it's a gamble but you have to start somewhere and that was a decision we had to make and I made the decision to play him. "But, of course, it's a different tempo and he lost the ball a couple of times." Explaining the decision to substitute the Costa Rica star, Jol said: "You felt in the first half that there was some pressure from the crowd because they expect a lot and I thought it was better for him and probably better for us because he has to cope with English football and you can't expect him, after two days, to be in his prime." Ruiz will have to wait for his next opportunity, with the forward cup-tied for Thursday night's Europa League Group K opener against his former club, FC Twente. The 26-year-old will not be able to feature in the competition until the new year after playing for Twente during their failed Champions League qualifying campaign. Jol, who revealed he would not draw on Ruiz's inside knowledge of Thursday's opponents, said: "He was pretty disgusted as well with the situation because he played a few games and he was injured before that, but that's the reality." Jol appears ready to risk resting Bobby Zamora, with Sunday's Premier League clash against Manchester City in mind. "He's fully fit, but we've got another game on Sunday, so that is another decision to make," the Dutchman said. "It could be a problem with the likes of Bobby Zamora - a bit older, maybe not a 100% fit. Don't forget that we missed Bobby in three league matches as well, so that was a problem." Others could also be given the night off. "If you play in the Europa on a Thursday, you have to play your league games on a Sunday - that is tough," said Jol, who is still searching for his first Premier League win in charge. "And that is why we will change a few positions to keep a few players maybe fitter for Sunday." Jol has a score to settle with Twente after they pipped his Ajax side to the 2010 Dutch title by a single point. "They never had any injuries then," he said. "They have to play on Thursdays now, so I think they will have a little problem. "I can remember that Bryan Ruiz, for example, scored seven or eight goals in the last five or six minutes and that was disgusting. "But I don't want to think about it anymore because that is in the past."
