One if Villarreal finished in one of the top four league positions in 2005–06, and an identical clause for the following season. On 25 April 2006, as Villarreal reached the last-four in the Champions League, in the second leg against Arsenal, Jens Lehmann saved a Riquelme penalty that would have taken the match to extra time. The game ended 0–0 at El Madrigal. Riquelme scored his first goal of the 2006–07 season in a 3–2 home victory against Real Zaragoza on 24 September 2006. He scored a penalty in the 79th minute to give Villarreal their third goal of the match. Riquelme went on to make just 13 league appearances during the first half of the 2006–07 La Liga and played no part in the 2006–07 Copa del Rey. Return to Boca Juniors (2007–14) 2007 loan Following a tense situation between player, the Villarreal board of directors and manager Manuel Pellegrini, Riquelme accepted a five-month loan back to Boca Juniors from February 2007 until 30 June 2007. He joined Boca for the 2007 Torneo Clausura of the 2007–08 Argentine Primera División season, debuting during the 2007 Torneo Clausura in a 1–1 home draw against Rosario Central on 17 February 2007. He scored his first goal for Boca – in his newest stint – in a 1–1 home draw against Independiente on 9 March 2007. He scored in the 54th minute to level the scores. His first goal of the 2007 Copa Libertadores came in Boca's third group-stage match against Mexico's Toluca on 22 March 2007. Riquelme scored in the 23rd minute, Boca's second goal of the match in an eventual 3–0 home victory. Boca finished in second position of their respective group with ten points, advancing to the knockout stages of the competition. During the knockout stages of the competition, Boca faced Vélez Sarsfield in the round of 16 fixtures. During the first leg on 2 May 2007, Riquelme scored in the first minute as Boca claimed a 3–0 home victory. Having progressed to the quarter-finals, Boca Juniors faced Paraguayan side Club Libertad. During the second-leg of the quarter-finals, played on 24 May 2007, Riquelme scored Boca's first goal in the 61st minute of the match as they claimed a 2–0 away victory and a 3–1 aggregate result, ensuring progression to the semi-finals. During Boca's second-leg semi-final fixture against Colombia's Cúcuta Deportivo on 7 June 2007, Riquelme scored a 44th-minute