Rafael Nadal teamed up with Carlos Alcaraz for the first time as Spain’s so-called dream team opened its Olympic doubles campaign with a 7-6, 6-4 defeat of Argentine sixth seeds Maximo Gonzales and Andres Molteni on Saturday. Despite some injury worries, the 38-year-old Nadal looked sharp as the 14-time French Open champion sealed the opening set with a fierce backhand …