Ajax won the UEFA Cup in 1992 to become the second club, after , to have won all three major European club competitions. After the sale of Bergkamp to in 1993, van Gaal re-signed the experienced Rijkaard to complement his young Ajax team featuring academy graduates Frank and Ronald de Boer, Edwin van der Sar, Clarence Seedorf, Edgar Davids, Michael Reiziger and Winston Bogarde, as well as mercurial foreign talents Finidi George, Nwankwo Kanu and Jari Litmanen, and veteran captain Danny Blind. The team regained the Dutch championship in 1993–94, and won it again in 1994–95 and 1995–96 to become the first Ajax side to win three back-to-back championships since 1968. The height of van Gaal's success came in 1994–95, where Ajax became the first, and to date only, team to complete an entire season unbeaten. The team also won its first European Cup since its 1970s era, defeating Milan in the 1995 UEFA Champions League final 1–0, with the winning goal scored by 18-year-old Patrick Kluivert. Ajax again reached the final one year later, but were defeated on penalties by . Ajax's return as a European force was short-lived, as van Gaal and several members of the squad soon departed to some of the continent's biggest clubs. The 2000s was a lean decade for the club, with only two championships won. However, Ajax's academy continued to produce star players such as Wesley Sneijder and Rafael van der Vaart. In 2010, Frank de Boer was appointed manager of Ajax and led the club to its first league title in seven years, and record 30th title overall, in the 2010–11 season. This was followed by back-to-back wins in 2011–12 and 2012–13 to match his three consecutive titles as a player in the 1990s. In 2013–14, Ajax were again champions, winning four consecutive league titles for the first time in club history. After finishing as runner-up to PSV in both 2014–15 and 2015–16, de Boer resigned as Ajax head coach in May 2016. Peter Bosz took over the club and led them to the 2017 UEFA Europa League final, their first European final in 21 years. They lost to Manchester United with a lineup that was the youngest ever in a European final, averaging an age of 22 years and 282 days. For the third consecutive season, they finished runner-up in the , this time to . The 2018–19 season for Ajax