The Premier League champions will kick-off the defence of their crown with a home game against Burnley on Saturday and boss Conte is still looking for new additions after bringing in Alvaro Morata, Tiemoue Bakayoko, Antonio Rudiger and Willy Caballero so far this summer.
Nemanja Matic has joined Manchester United, Nathan Ake has left for Bournemouth and Diego Costa is surplus to requirements so, with Eden Hazard and Bakayoko injured, Conte is low on numbers for the first weekend of the season after also allowing the likes of Tammy Abraham and Nathaniel Chalobah out on loan.
The Italian knows he needs more new players and reports suggest he is after Arsenal midfielder Oxlade-Chamberlain, also a target for Liverpool, in a £25million deal.
Conte was asked if defending the title would be difficult without more new signings, and told Sky Sports: "Yes very hard. For sure. This league is not easy.
"You have to fight against other teams. This league is different to other countries, [where] you'll find two teams to fight; here, you have six teams which are very strong. You must be prepared to fight very hard."
Conte added: "The most important is my club knows very well which are our priortiies. I work to try and improve our squad."