Slavisa Jokanovic is determined to stay positive and expects his Fulham players to improve in the coming weeks, following a 2-0 defeat by Crystal Palace.
Head coach Jokanovic saw the Cottagers come up short on their return to the Premier League, but the Serb refused to be too downbeat after seeing his side beaten by their capital rivals.
He told his club's official website: "We wanted to start the competition with a positive result. We showed some positive things and some negative things.
"It's the first time we've tested ourselves at this level – we found more power, speed and quality, and we must adapt ourselves quickly.
"At this level, you normally pay an expensive price for mistakes. We're in a process of working and learning and I’m sure we'll be better during the weeks in front of us.
"I'm confident. It's a tough job ahead of us, so we must be optimists and trust in ourselves."
Another London derby awaits Fulham next time out, with the Cottagers heading to Wembley to take on Tottenham Hotspur next Saturday.
The two teams last faced each other in the FA Cup in February 2017, when a Harry Kane hat-trick earned Spurs a 3-0 victory at Craven Cottage.
The Cottagers can be backed at 5/1 to secure a draw next weekend, with hosts Spurs 1/4 to win the game and 13/2 to do so by a 2-0 scoreline.
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