was with us for seven years, from 17, he's now just 24, Wenger explained. Sometimes you have to be patient. I am very happy for him because he has shown great mental strength. Now all eyes will be on next week's clash between Arsenal and Chelsea which will likely decide the title. They have the games in hand, said Wenger, playing down his club's title aspirations. But we 'll keep going and that's why the win was so important for us today. Relegation dogfight Meanwhile it was a good day for teams at the bottom of the league. Aston Villa continued their good form since appointing coach Tim Sherwood with a 1-0 victory over Tottenham, who fired Sherwood last season. Belgian international Christian Benteke scored the only goal of the game, his eighth in six matches, to secure a vital three points to give the Midlands club breathing space. Another Midlands club looking over their shoulder is West Brom, who conceded an injury time goal to lose 3-2 against bottom club Leicester City. But it was an awful day for Sunderland's former Dutch international coach Dick Advocaat, who saw his team lose 4-1 at home against form team Crystal Palace. Democratic Republic of Congo international Yannick Bolasie scored Crystal Palace's first ever hat trick in the Premier League to secure an easy victory.