Alvaro Morata and Olivier Giroud are being backed to score “a lot of goals” for Chelsea by club legend and current first-team coach Gianfranco Zola.Both of the Blues forwards boast proven track records, with their reputations having been built during spells with the likes of Juventus, Real Madrid and Arsenal.They are also established senior internationals, with Giroud having helped France to World Cup glory over the summer. Article continues below Editors’ Picks Man Utd ready to spend big on Sancho and Haaland in January Who is Marcus Thuram? Lilian’s son who is top of the Bundesliga with Borussia Monchengladbach Brazil, beware! Messi and Argentina out for revenge after Copa controversy Best player in MLS? Zlatan wasn’t even the best player in LA! Domestic struggles have been endured, however, with Morata having admitted to experiencing a dip in confidence during his time in west London while his striking rival has slipped in and out of the side.Giroud only opened his account for the 2018-19 campaign during a Europa League clash with BATE on Thursday, while Morata took a while to find a spark before recording five efforts in his last seven appearances.Zola told Sky Sports on what can be expected from the pair heading forward: “You probably expect the main strikers to be the main scorers but sometimes that’s not the case, especially if you play differently.“[Maurizio] Sarri asks the strikers to do a lot of work for the team, and even if they don’t score, they are very important for the team. I think they are learning about this.“At the moment they are busy doing this and have less attention for scoring. But it will come. I’m 100 per cent it will come. Also they have a good attitude on the pitch and in the week.“The strikers for Maurizio, they always score a lot of goals. Maybe not at the beginning, but in the end they score. That’s what I’m hoping is going to be the case here as well.”Zola has also backed Ross Barkley to continue making a positive impression at Stamford Bridge, with the 24-year-old midfielder enjoying a return to form which has him earning plenty of plaudits and further England recognition.The Italian added: “He had a big injury that stopped him from playing at his best in the last few years. That’s something that has to be said.“It’s been important for him the way we play because it’s making him a little bit more complete.“We always knew he had ability – physical ability, technical ability. But to play the midfield position, he was lacking a little bit of tactical awareness and defensive awareness.“He’s doing very well right now and it’s making him a better player. All these things, added to what he already had, is making him one of the best midfielders in the country.” Check out Goal’s Premier League 2019-20 fantasy football podcast for game tips, debate and rivalries.