him the second-oldest Grand Slam qualifier in the Open Era after Mal Anderson qualified for the 1977 Australian Open. It was his 17th Grand Slam draw participation at the US Open and the 63rd overall Grand Slam main draw appearance for the 42-year-old. He lost in the first round to 5th seed Andrey Rublev in straight sets. National representation Karlović has been absent from some previous Croatian Davis Cup campaigns owing to his dispute with the Croatian Tennis Association. He further strained his relations with the Croatian Tennis Association and the Croatian Olympic Committee by his last-minute withdrawal from the Olympic tournament in Beijing, communicated via an SMS message. He played against Japan in the first round in 2012 in Japan with wins over Kei Nishikori and Go Soeda in singles and in doubles winning with Dodig. In 2016, he accepted an invitation to the Davis Cup final against Argentina. He played the second match, losing against Juan Martín del Potro, and had to play the last deciding match, again losing against Federico Delbonis. Performance timelines Singles {|class="wikitable nowrap" style=text-align:center;font-size:84% !Tournament!!2000!!2001!!2002!!2003!!2004!!2005!!2006!!2007!!2008!!2009!!2010!!2011!!2012!!2013!!2014!!2015!!2016!!2017!!2018!!2019!!2020!!2021!!SR!!W–L!!Win% |- | colspan="26" align="left" |Grand Slam tournaments |- |align=left|Australian Open |A |bgcolor=ecf2ff|Q3 |bgcolor=ecf2ff|Q2 |A |bgcolor=afeeee|2R |bgcolor=afeeee|1R |bgcolor=afeeee|1R |bgcolor=afeeee|1R |bgcolor=afeeee|3R |bgcolor=afeeee|2R |bgcolor=afeeee|4R |bgcolor=afeeee|1R |bgcolor=afeeee|3R |bgcolor=afeeee|1R |bgcolor=afeeee|1R |bgcolor=afeeee|2R |bgcolor=afeeee|1R |bgcolor=afeeee|3R |bgcolor=afeeee|3R |bgcolor=afeeee|2R |bgcolor=afeeee|2R |A |0 / 17 |16–17 |48% |- |align=left|French Open |A |A |bgcolor=ecf2ff|Q1 |bgcolor=ecf2ff|Q2 |bgcolor=afeeee|1R |bgcolor=afeeee|1R |bgcolor=afeeee|2R |bgcolor=afeeee|2R |bgcolor=afeeee|1R |bgcolor=afeeee|1R |A |bgcolor=afeeee|1R |bgcolor=afeeee|1R |A |bgcolor=afeeee|3R |bgcolor=afeeee|1R |bgcolor=afeeee|3R |bgcolor=afeeee|2R |bgcolor=afeeee|1R |bgcolor=afeeee|2R |bgcolor=ecf2ff|Q2 |A |0 / 14 |8–14 |36% |- |align=left|Wimbledon |bgcolor=ecf2ff|Q3 |bgcolor=ecf2ff|Q2 |bgcolor=ecf2ff|Q1 |bgcolor=afeeee|3R |bgcolor=afeeee|4R |bgcolor=afeeee|1R |bgcolor=afeeee|1R |bgcolor=afeeee|1R |bgcolor=afeeee|1R |bgcolor=ffebcd|QF |A |bgcolor=afeeee|2R |bgcolor=afeeee|2R |A |bgcolor=afeeee|1R |bgcolor=afeeee|4R |bgcolor=afeeee|2R |bgcolor=afeeee|1R |bgcolor=afeeee|2R |bgcolor=afeeee|2R |style=color:#767676|NH |bgcolor=ecf2ff|Q1 |0 / 15 |17–15 |53% |- |align=left|US Open |bgcolor=ecf2ff|Q1 |bgcolor=ecf2ff|Q2 |bgcolor=ecf2ff|Q1 |bgcolor=afeeee|3R |bgcolor=afeeee|1R |bgcolor=afeeee|2R |bgcolor=afeeee|1R |bgcolor=afeeee|1R |bgcolor=afeeee|3R |bgcolor=afeeee|1R |A |bgcolor=afeeee|3R |bgcolor=afeeee|1R |bgcolor=afeeee|2R |bgcolor=afeeee|2R |bgcolor=afeeee|2R |bgcolor=afeeee|4R |bgcolor=afeeee|1R |bgcolor=ecf2ff|Q2 |bgcolor=afeeee|1R |bgcolor=afeeee|1R |bgcolor=afeeee|1R |0 / 17 |13–17 |43% |-style=font-weight:bold;background:#efefef |style=text-align:left|Win–loss |0–0 |0–0 |0–0 |4–2 |4–4 |1–4 |1–4 |1–4 |4–4 |5–4 |3–1 |3–4 |3–4 |1–2 |3–4 |5–4 |6–4 |3–4 |3–3 |3–4 |1–2 |0–1 |0 / 63 |54–63 |46% |- | colspan="26" align="left" |National representation |- |align=left|Summer Olympics |A |colspan=3 style=color:#767676|Not Held |bgcolor=afeeee|3R |colspan=3 style=color:#767676|Not Held |A |colspan=3 style=color:#767676|Not Held |A |colspan=3 style=color:#767676|Not Held |A |colspan=4 style=color:#767676|Not Held |A |0 / 1 |2–1 |67% |- |align=left|Davis Cup |bgcolor=ecf2ff|Z2 |A |bgcolor=ffebcd|QF |A |bgcolor=afeeee|1R |bgcolor=lime|W |A |A |bgcolor=ecf2ff|PO |bgcolor=yellow|SF |bgcolor=ffebcd|QF |bgcolor=afeeee|1R |bgcolor=ffebcd|QF |A |A |A |bgcolor=thistle|F |A |A |A |A |A |1 / 8 |9–10