The Brazilian , however , agreed only to sign up for the first race in South Africa , where he would assess whether McLaren 's equipment was competitive enough for him to put in a good season .
Dennis persuaded Senna to return to McLaren .
The Brazilian , however , agreed only to sign up for the first race in South Africa , where Senna would assess whether McLaren 's equipment was competitive enough for Senna to put in a good season .
Dennis persuaded Senna to return to McLaren .