He is scheduled to play in Barcelona next week, then Estoril and the Rome Masters.
On Sunday, he beat Rafael Nadal in the Rome Masters, his fourth-straight win over the Spaniard.
The 27-year-old will now head to the Rome Masters as he prepares for the French Open later this month.
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Nadal, who has only ever lost once at the Rome Masters, broke in the next game and pressed on to take the match.
Nadal will take comfort in knowing that he beat Fognini, a talented right-hander and former French Open quarterfinalist, 6-1, 6-3 earlier this month at the Rome Masters.
Nadal heads to Italy on Monday for the Rome Masters, the location of his last defeat on clay when he lost to compatriot Juan Carlos Ferrero last year.
The 25-year-old pulled out of the recent Rome Masters with a back injury but showed no signs of discomfort as he set up a second round clash with Finland's Jarkko Nieminen.
Meanwhile, Martinez Sanchez, who knocked out both Jelena Jankovic and Caroline Wozniacki on her way to a shock success in last month's Rome Masters, slumped 6-2 6-4 to Uzbekistan's world 97 Akgul Amanmuradova.
Nadal, whose last title was at the Rome Masters in April, admits Djokovic is the form player in men's tennis after his victory over Roger Federer in the Swiss Indoors final last week.
The Monte Carlo resident made it to final of the Madrid Masters Series event and the last four of the Rome and Toronto Masters, as well as reaching at least the semi-finals stages in five other tournaments.
"I feel fit and strong enough to play the Masters in Rome and Hamburg and the World Team Cup, " said Hewitt, whose least favourite surface is clay.
Another final in the Masters Series at Indian Wells, before destroying Gustavo Kuerten and Marat Safin on his way to the Masters title in Rome finished off an excellent start to the year.
That position was based on his early season form on clay, when he won four titles, including beating Gustavo Kuerten in the Masters Series event in Rome in the build-up to Roland Garros.
With the clay court season about to kick off, Djokovic is keen not to take any unnecessary risks ahead of the Masters events in Madrid and Rome before going into the French Open next month.
Nadal has already claimed Masters victories in Monte Carlo and Rome and victory over old rival Federer -- who beat him in last year's Madrid final -- will give him a record 18 Masters titles, one more than Federer and Andre Agassi.
But returning this spring to his favored clay, Nadal once again looks all-conquering with wins at the Masters 1000 tournaments in Monte Carlo and Rome.
However, Nadal again looks the man to beat as the Spaniard aims to add the Madrid title to his recent Masters victories in both Monte Carlo and Rome.
But he has been surpassed by Rafael Nadal on the list of all-time Masters Series titles after the Spaniard won in Rome to match record-holder Andre Agassi on 17.
Federer, who has not played since the Miami Masters last month, is set to make his return to the circuit at the Rome clay event starting on April 25.
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