The study aimed at examining the relationship between teachers' professional skills and students' achievement in English at BA Level. The researchers explored the students' perceptions about their teachers' professional skills required for teaching English and their relationship with students' achievement. Population of the study comprised students of Government Degree Colleges affiliated with University of the Punjab. Twenty percent of colleges were selected through random sampling. Research design was correlational. Students' Questionnaire for Teachers' Professional Skills (SQTPS) was used to collect data. Data analysis was carried out through SPSS. Initially, demographic variables were analyzed. Relationship between teachers' professional skills and students' achievements in English at BA levels was found out through Pearson's product-moment. Weak positive significant relationship was found between teachers' professional skills in assessment and student achievement in English at BA level. It also found that on the basis of gender there is no difference in the teachers' professional skills and students' achievements. Teachers prefer to assess the students individually relying on oral questioning for the comprehension of the students. It is recommended that for the better students' achievement in English there is need to change the assessment system.