 Complete the following phrase:  In 1997, Coulthard again partnered Häkkinen at McLaren. He started his season by taking victory in the opening round in Australia. Coulthard was unable to score in the next four rounds, due to being involved in a collision in Argentina and contended with unreliability with his car. The factor of unreliability had an impact throughout the season, which became notable in Canada when Coulthard made a pit stop while leading and the car developed clutch problems. He suffered from four more retirements throughout the season, and was able to take victory at the Italian Grand Prix. He was able to secure two more podium positions in 