The Dutch manager has already signed a number of players this summer but feels his squad needs a couple more to deal with potential injuries and suspensions next season
The Cottagers completed their pre-season tour of Costa Rica on Saturday with another victory, winning 5-3 in a penalty shootout over Deportivo Saprissa.
And Jol has been impressed by his squad’s performances during the programme so far, but feels he still needs some players to deal with potential injuries and suspensions next season.
"Of course, this was our last game of the week so we looked a bit tired. They were fresh, they’re a good team actually," he told the club’s official website.
"We saw maybe eight, nine, 10 very good players here so it was a very good exercise and we could train well and we played good games, all the players were involved. It was almost perfect.
"We are still looking for one or two players to make it 100 per cent. You saw 22, 23 players and they did their best.
"We would like to be in the top 10. We were a bit unlucky last year because we missed a lot of players - Mousa Dembele went, then of course top scorer Clint Dempsey went and Danny Murphy, then Mahamadou Diarra was injured.
"Steve Sidwell was suspended for seven games, so it was too much probably on the shoulders of Bryan and I feel this year will be our year again as we have good quality and I feel that we are very positive."
The former Ajax boss has already signed centre-back Fernando Amorebieta, midfielder Derek Boateng and goalkeeper Maarten Stekelenburg this summer.
Fulham's pre-season preparations continue next Sunday with a friendly at Werder Bremen, before their Premier League campaign kicks off with a trip to Sunderland on August 17.