Dave Jones is confident Cardiff can deliver this season after they continued their unbeaten start in the Championship with a win at Portsmouth.[LNB] Hayden Mullins' own goal put the Bluebirds ahead before the interval and Jay Bothroyd's sixth goal of the season put game to bed four minutes into the second period of a 2-0 victory.[LNB]The win sees Cardiff in second place with 10 points from their four games and Jones believes a promotion assault is on the cards.[LNB]"We worked hard and that is where the goals came from. We ground them down," he said.[LNB]"We have got new players coming in and it takes a little bit of time to get it right but it was a professional performance from us.[LNB]"Portsmouth still have Premier League players and we knew we would have to work for the victory.[LNB]"We are changing the culture at the club and we have raised the bar. You have to do that when you bring good players in.[LNB]"In previous years we have had to sell our best players but this season we have kept them and added to the squad and that has changed expectation levels.[LNB]"I have had success wherever I have been and I have had success here. I am just trying to do my job.[LNB]"The fans have had some good times here and hopefully I can make this another successful season for them."[LNB]Portsmouth manager Steve Cotterill was left to bemoan his side's lack of firepower as they prop up the rest of the division with just one point.[LNB]He said: "We gave away two silly goals and that sums up the way things have been going for us for the past eight weeks.[LNB]"The trouble is if someone scores twice against us we do not have the firepower to come back.[LNB]"We are bottom of the league and the alarm bells are ringing but I was ringing them from the first day I took the job.[LNB]"I always knew this was a tough job and no-one will ever know just how tough it is because I won't tell them because if I give in then everyone will give in.[LNB]"This is still a great club and we have to make sure we get things right on the pitch.[LNB]"I am a fighter and I will keep fighting but as a manager you need the tools to be able to do your job to the best of your ability.[LNB]"It concerns me we will lose players before the transfer window closes."