Panther Club Ishaq made his professional debut in
2004–05 Pakistan Premier League with
Panther Club of his hometown
Faisalabad, finishing the season in relegation zone at 11th position with 30 points, but avoided relegation due to Allied Bank who had finished in 8th position dissolving their team at the end of the season. The team got relegated in the next
2005–06 season, finishing 11th again, with 20 points. Ishaq scored his first goal for Panther Club in a 5–0 victory over City Football Club from Lahore in
2005 National Challenge Cup on 11 June 2005, scoring the second goal of the match and his team in the 47th minute. In the
2007–08 season, Ishaq scored his first goal with KRL on 5 January 2008 in the 4–1 win against
Pakistan Airlines, scoring the equaliser after
Shakir Lashari gave the lead to Pakistan Airlines in the 11th minute. Ishaq again ended 3rd with Khan Research Laboratories, as his side had the second best defense of the league behind
Pakistan Army, who conceded 10 goals as compared to 13 of Khan Research Laboratories. However they finished third in the league again behind league winners and runners-up
WAPDA and Pakistan Army respectively. He scored his first goal of the season in a 2–0 win over
National Bank on 7 August 2009, as he opened the scoring in the 63rd minute. Ishaq scored the fastest goal of the
2010 National Football Challenge Cup, when he scored the goal in the 2nd minute of the match in the finals, as his team went on to defeat
Pakistan Navy 4–0, with
Kaleemullah Khan, Zubair Ahmed and Abid Ghafoor scoring in the 22nd, 63rd and 77th minutes respectively. Ishaq scored his only goal of the season against Pakistan Army on 20 September 2010, converting a penalty in the 56th minute. Ishaq however, won his and his team's third consecutive
National Challenge Cup title as they defeated
Karachi Electric Supply Corporation 1–0 in the finals held at Ishaq's hometown of
Faisalabad. Ishaq scored his only goal of the tournament in the
group stage in a 2–0 win over
Habib Bank. Ishaq became the captain of Khan Research Laboratories, at the
2011–12 season, as they went on to achieve the
double once again. He won the league as Khan Research Laboratories finished at the top of the table, 20 points clear of surprise runners-up
Afghan Chaman. This was the first time in the Pakistan Premier League that the league was won by any team with 6 games remaining to play. He was again declared player of the season. Ishaq won the 2012
National Football Challenge Cup 3–1 on penalties after the match stayed 0–0 after
extra-time, Ishaq's missed his penalty after hitting the post. Ishaq won his third league and second consecutive title, as they went on to win the
2012–13 Pakistan Premier League, courtesy of
Kaleemullah Khan who scored 35 goals in 30 games, most in the history of
Pakistan Premier League. Ishaq scored his first league goal of the season on 5 January 2013, after scoring a penalty in the 77th minute against
Karachi Port Trust 2–1. Ishaq missed the decisive penalty in a quarter-finals match against
National Bank in the
2013 National Football Challenge Cup, causing them to crash out of the tournament. He was captain of the team which reached the
2013 AFC President's Cup final, after falling to Turkmen club
Balkan FT by 0–1 in the final. == International career ==