Chelsea boss Jose Mourinho is delighted to have a virtual full-strength squad available for preseason training.

The London club are on their fourth consecutive pre-season tour to the United States, and Mourinho is delighted he has a squad close to full strength with a strong work ethic.

"Last year was a disaster because we started the season with half of the team," Mourinho told a news conference at the Beverly Hills Hotel on Wednesday after introducing new signing, Israel defender Tal Ben Haim.

"And after that, every two to three days, some players arrived depending on their (national) team's performance at the World Cup.

"We had players who were out in last 16, out in the quarter-finals and then finally the Portuguese and the French guys because they had reached the semi-final stage. It was a complete disaster.

"This season we are starting with everybody. Only Pizarro is not here and Ballack with injury."

Striker Claudio Pizarro, who recently moved to Chelsea from Bayern Munich on a free transfer, has been given extra time off after playing in the Copa America for Peru.

German midfielder Michael Ballack is out of action with an unspecified foot injury.