Novak Djokovic plans to use the challenging experiences he has endured this year due to being unvaccinated against COVID-19 as fuel for the rest of the season, the world number one said on Sunday ahead of his return to action in Monte Carlo. The 20-times Grand Slam champion was unable to defend his Australian Open title in January after being deported from the country, having initially been admitted to the tournament despite not taking the vaccine. “I try to be optimistic in life and consider myself a very optimistic, positive person,” Serbian Djokovic told reporters. “I take lessons available in every experience, particularly in something as large as what happened in January. “Once I start playing matches … I will obviously have to deal with everything that probably has been dormant inside and is maybe waiting to come out. “I don’t feel it has left huge scars that I’m unable …