 Complete the following phrase:  In the 200708 season, Alex Ferguson adopted a rotation system between Giggs and newcomers Nani and Anderson. Giggs scored his 100th league goal for United against Derby County on 8 December 2007, which United won 41. More landmarks have been achieved: on 20 February 2008 he made his 100th appearance in the UEFA Champions League in a game against Lyon and on 11 May 2008, he came on as a substitute for Park Ji-sung to equal Sir Bobby Charltons record of 758 appearances for United. Giggs scored the second goal in that match, sealing his, and Uniteds, 10th Premier League title. Ten days later, on 21 May 2008, Giggs broke Bobby Charltons appearance record for United when coming on as an 87th-minute substitute for Paul Scholes in the 